<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f055a-0c4b-7384-8c8d-f336523f352c,g:81c8c1fd-08d0-4217-b514-5eddee313e65-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="panw-20260731.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetCurrent_019f055a-0f33-725e-a8b6-ddf2ce23369d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_CapitalizedContractCostNetCurrent_019f055a-0f33-725e-a8b6-ddf2ce23369d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019f055a-0f33-7213-97f9-86a4058ec337" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019f055a-0f33-7213-97f9-86a4058ec337" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_019f055a-0f33-7f57-8f1a-a19472051ba0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_ShortTermInvestments_019f055a-0f33-7f57-8f1a-a19472051ba0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019f055a-0f33-7656-9791-78a2dcd72645" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019f055a-0f33-7656-9791-78a2dcd72645" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f055a-0f33-77ea-a2b1-749e8bac2870" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f055a-0f33-77ea-a2b1-749e8bac2870" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f33-71bd-84e7-8c704216dfdd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableNetCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019f055a-0f33-792a-aafb-aa14722445e4" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f33-71bd-84e7-8c704216dfdd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019f055a-0f33-7cbd-8888-a1438fe083f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019f055a-0f33-7cbd-8888-a1438fe083f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetNoncurrent_019f055a-0f33-77fd-a079-daed89190d65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostNetNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_CapitalizedContractCostNetNoncurrent_019f055a-0f33-77fd-a079-daed89190d65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019f055a-0f33-7960-96e9-131054ad1dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_AssetsCurrent_019f055a-0f33-7960-96e9-131054ad1dcf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019f055a-0f33-7358-94ba-0ce3f83c5207" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019f055a-0f33-7358-94ba-0ce3f83c5207" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019f055a-0f33-7364-a6bf-8e0394e87a72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_Goodwill_019f055a-0f33-7364-a6bf-8e0394e87a72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_019f055a-0f33-71bb-a578-1b21a11b180e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermInvestments"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_LongTermInvestments_019f055a-0f33-71bb-a578-1b21a11b180e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f055a-0f33-72b2-a303-044137266f50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f055a-0f33-72b2-a303-044137266f50" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f33-77d4-ba8a-1526de6b0ce8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f33-77d4-ba8a-1526de6b0ce8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019f055a-0f33-708f-98be-5b0a544d745d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019f055a-0f33-708f-98be-5b0a544d745d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019f055a-0f33-79ba-98f6-d1cbbc0d5ec1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019f055a-0f33-7883-a0d2-fd4a16518c4b" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019f055a-0f33-79ba-98f6-d1cbbc0d5ec1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f055a-0f33-7b84-beab-8ba635f93ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019f055a-0f33-73d6-98a5-ae1deccf6112" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f055a-0f33-7b84-beab-8ba635f93ac8" xlink:to="loc_us-gaap_PreferredStockValue_019f055a-0f33-73d6-98a5-ae1deccf6112" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_019f055a-0f33-7e88-b117-5289ffd52538" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStocksIncludingAdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f055a-0f33-7b84-beab-8ba635f93ac8" xlink:to="loc_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_019f055a-0f33-7e88-b117-5289ffd52538" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f055a-0f33-7ab0-8d1b-aa8d3d513a28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f055a-0f33-7b84-beab-8ba635f93ac8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f055a-0f33-7ab0-8d1b-aa8d3d513a28" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f055a-0f33-797e-bed3-99cafabcf814" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019f055a-0f33-7b84-beab-8ba635f93ac8" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f055a-0f33-797e-bed3-99cafabcf814" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-730d-9692-10c64e6b93ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019f055a-0f33-753a-9e1b-2480e8edc768" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-730d-9692-10c64e6b93ff" xlink:to="loc_us-gaap_AccountsPayableCurrent_019f055a-0f33-753a-9e1b-2480e8edc768" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019f055a-0f33-726f-beb6-3a3c4e3083a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-730d-9692-10c64e6b93ff" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019f055a-0f33-726f-beb6-3a3c4e3083a1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019f055a-0f33-72c9-906d-a958f33db45d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-730d-9692-10c64e6b93ff" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019f055a-0f33-72c9-906d-a958f33db45d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019f055a-0f33-75eb-9341-937a6b2c3fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-730d-9692-10c64e6b93ff" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019f055a-0f33-75eb-9341-937a6b2c3fd3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-7eb3-8dc6-ee304c8cffd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_LiabilitiesCurrent_019f055a-0f33-7eb3-8dc6-ee304c8cffd5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_019f055a-0f33-7a0c-9212-c9c32d699583" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_019f055a-0f33-7a0c-9212-c9c32d699583" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019f055a-0f33-7f51-b174-e39379352c14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019f055a-0f33-7f51-b174-e39379352c14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019f055a-0f33-7635-99d0-53647d2009fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019f055a-0f33-7635-99d0-53647d2009fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f055a-0f33-7d63-a568-7b8773b86198" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f055a-0f33-7d63-a568-7b8773b86198" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019f370c-a242-7306-8505-8cc1eaea50de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019f055a-0f33-7ec5-a437-c3764cafe5ee" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019f370c-a242-7306-8505-8cc1eaea50de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f055a-0f33-75e9-a18a-4aa893163a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f055a-0f33-7162-89ec-268750fb00bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f055a-0f33-75e9-a18a-4aa893163a5c" xlink:to="loc_us-gaap_StockholdersEquity_019f055a-0f33-7162-89ec-268750fb00bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019f055a-0f33-78db-83aa-270cd5c31203" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f055a-0f33-75e9-a18a-4aa893163a5c" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019f055a-0f33-78db-83aa-270cd5c31203" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019f055a-0f33-7f39-bdd6-c474a2748a21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f055a-0f33-75e9-a18a-4aa893163a5c" xlink:to="loc_us-gaap_Liabilities_019f055a-0f33-7f39-bdd6-c474a2748a21" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="panw-20260731.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019f055a-0f33-79b5-8f7f-2d9d75eaae69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019f055a-0f33-7303-9171-6e51bb12607e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019f055a-0f33-79b5-8f7f-2d9d75eaae69" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019f055a-0f33-7303-9171-6e51bb12607e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f055a-0f33-7f59-9fdd-12957c93d148" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019f055a-0f33-79b5-8f7f-2d9d75eaae69" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f055a-0f33-7f59-9fdd-12957c93d148" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019f055a-0f33-7fe6-9291-5f5858b68991" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aa4-860c-1f6b570ea8d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019f055a-0f33-7fe6-9291-5f5858b68991" xlink:to="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aa4-860c-1f6b570ea8d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019f055a-0f33-77d8-904f-fad8a606a4b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019f055a-0f33-7fe6-9291-5f5858b68991" xlink:to="loc_us-gaap_GrossProfit_019f055a-0f33-77d8-904f-fad8a606a4b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aeb-8542-54cf7d1397c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019f055a-0f33-7c8c-9435-eea32a4618a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aeb-8542-54cf7d1397c1" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019f055a-0f33-7c8c-9435-eea32a4618a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_019f055a-0f33-71b4-bab4-12206f53c287" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aeb-8542-54cf7d1397c1" xlink:to="loc_us-gaap_SellingAndMarketingExpense_019f055a-0f33-71b4-bab4-12206f53c287" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019f055a-0f33-7e93-b0a1-e2b6d53a31cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019f055a-0f33-7aeb-8542-54cf7d1397c1" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019f055a-0f33-7e93-b0a1-e2b6d53a31cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7f46-a77a-eb49d876f78c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0f33-7146-85a1-bf8a3c72fda8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7f46-a77a-eb49d876f78c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0f33-7146-85a1-bf8a3c72fda8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0f33-7865-9810-3d47ef84f649" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7f46-a77a-eb49d876f78c" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0f33-7865-9810-3d47ef84f649" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0f33-7206-8417-90270e2bf4d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019f055a-0f33-783e-9dea-f0ec1dcf0bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0f33-7206-8417-90270e2bf4d3" xlink:to="loc_us-gaap_OperatingIncomeLoss_019f055a-0f33-783e-9dea-f0ec1dcf0bf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0f33-7fd6-8bf7-65b1cae28d2e" xlink:href="panw-20260731.xsd#panw_OtherNonoperatingIncomeExpenseNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0f33-7206-8417-90270e2bf4d3" xlink:to="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0f33-7fd6-8bf7-65b1cae28d2e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="simple" xlink:href="panw-20260731.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f055a-0f33-70e3-8163-8697d946c404" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7d49-b77c-3af8588f39c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f055a-0f33-70e3-8163-8697d946c404" xlink:to="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7d49-b77c-3af8588f39c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7744-b63e-aa701d7b2e96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019f055a-0f33-70e3-8163-8697d946c404" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7744-b63e-aa701d7b2e96" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7500-8818-5dfcd99e58e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019f055a-0f33-7923-b63f-65292ed11f4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7500-8818-5dfcd99e58e5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019f055a-0f33-7923-b63f-65292ed11f4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019f055a-0f33-7bf2-90b5-5b37ef10d13a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7500-8818-5dfcd99e58e5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019f055a-0f33-7bf2-90b5-5b37ef10d13a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustmentAttributableToParent_019f371f-3a3f-71ac-b62b-ffbb3708d8d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustmentAttributableToParent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019f055a-0f33-7500-8818-5dfcd99e58e5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustmentAttributableToParent_019f371f-3a3f-71ac-b62b-ffbb3708d8d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019f055a-0f33-7632-a2e6-912551633421" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_019f055a-0f33-7fcc-aba5-d517836be2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019f055a-0f33-7632-a2e6-912551633421" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_019f055a-0f33-7fcc-aba5-d517836be2fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_019f055a-0f33-797c-b99e-3d7e8df84c95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019f055a-0f33-7632-a2e6-912551633421" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_019f055a-0f33-797c-b99e-3d7e8df84c95" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="panw-20260731.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfConvertibleDebt_019f055a-0f33-7130-9e32-b2f287e59d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_RepaymentsOfConvertibleDebt_019f055a-0f33-7130-9e32-b2f287e59d7a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019f055a-0f33-7275-ab13-c14d6ba5fccc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019f055a-0f33-7275-ab13-c14d6ba5fccc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019f055a-0f33-7646-a6fb-971976b3f9f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019f055a-0f33-7646-a6fb-971976b3f9f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_019f055a-0f33-7374-8166-0df55a7c3d95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_019f055a-0f33-7374-8166-0df55a7c3d95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019f3759-fe2d-7941-8bf2-d0eb27ac28a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019f3759-fe2d-7941-8bf2-d0eb27ac28a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019f3759-fe2d-7e27-8856-7fb2e761426f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-794e-9f4c-15719e1acdb8" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019f3759-fe2d-7e27-8856-7fb2e761426f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7db4-b365-2d1cb9387ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_NetIncomeLoss_019f055a-0f33-7db4-b365-2d1cb9387ccb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019f055a-0f33-7ae3-8b9d-7973c570d6e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_ShareBasedCompensation_019f055a-0f33-7ae3-8b9d-7973c570d6e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019f055a-0f33-761f-b736-434f940e0504" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019f055a-0f33-761f-b736-434f940e0504" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019f055a-0f33-7a50-9c2f-35b9cbeb3ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019f055a-0f33-7a50-9c2f-35b9cbeb3ae5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_019f055a-0f33-72e6-a7d2-d9a9a2b10dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_019f055a-0f33-72e6-a7d2-d9a9a2b10dfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019f055a-0f33-7524-b922-de344335d691" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019f055a-0f33-7524-b922-de344335d691" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_ChangeInFairValueOfConvertibleSeniorNotesAndDerivativeAsset_019f055a-0f33-7b65-bc97-1a0187308cd3" xlink:href="panw-20260731.xsd#panw_ChangeInFairValueOfConvertibleSeniorNotesAndDerivativeAsset"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_panw_ChangeInFairValueOfConvertibleSeniorNotesAndDerivativeAsset_019f055a-0f33-7b65-bc97-1a0187308cd3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019f055a-0f33-768d-b746-74d712dd7dba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019f055a-0f33-768d-b746-74d712dd7dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_019f055a-0f33-730b-b966-721c8d0ce25e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_019f055a-0f33-730b-b966-721c8d0ce25e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019f055a-0f33-70ec-a598-e18dedbf6ab2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019f055a-0f33-70ec-a598-e18dedbf6ab2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax_019f055a-0f33-7474-8714-a86ceec3c1af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax_019f055a-0f33-7474-8714-a86ceec3c1af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019f055a-0f33-7e5a-8ea3-21c417a87631" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019f055a-0f33-7e5a-8ea3-21c417a87631" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_019f055a-0f33-7eb9-b94b-c516ce1afad2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInFinanceReceivables"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInFinanceReceivables_019f055a-0f33-7eb9-b94b-c516ce1afad2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_IncreaseDecreaseInCapitalizedContractCost_019f055a-0f33-7357-9256-c5160920a714" xlink:href="panw-20260731.xsd#panw_IncreaseDecreaseInCapitalizedContractCost"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_panw_IncreaseDecreaseInCapitalizedContractCost_019f055a-0f33-7357-9256-c5160920a714" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019f055a-0f33-7fac-9542-47fae8309863" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="15" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019f055a-0f33-7fac-9542-47fae8309863" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019f055a-0f33-7d15-888d-af5b419343cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019f055a-0f33-7d15-888d-af5b419343cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_019f055a-0f33-7215-bc17-ba7ed09a6088" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_019f055a-0f33-7215-bc17-ba7ed09a6088" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019f375a-820b-7833-a829-bf6761eded35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019f375a-820b-7833-a829-bf6761eded35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019f375a-820b-7629-904d-79920167a8f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="19" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7330-9f4c-65ea2719544a" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019f375a-820b-7629-904d-79920167a8f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f055a-0f33-774b-8570-6e69315fe365" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7fac-a54d-1a84e7456358" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f055a-0f33-774b-8570-6e69315fe365" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f055a-0f33-7fac-a54d-1a84e7456358" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7ee6-a545-54d1f74bab3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f055a-0f33-774b-8570-6e69315fe365" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7ee6-a545-54d1f74bab3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-7e34-a51d-2d717bf52317" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f055a-0f33-774b-8570-6e69315fe365" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f055a-0f33-7e34-a51d-2d717bf52317" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f375a-e38f-76f8-8428-f8ce24f60c07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f055a-0f33-774b-8570-6e69315fe365" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f375a-e38f-76f8-8428-f8ce24f60c07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_019f055a-0f33-75c2-925c-93dd13c9b13a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireInvestments"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_019f055a-0f33-75c2-925c-93dd13c9b13a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019f055a-0f33-7b37-91b7-98ab0dd47183" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019f055a-0f33-7b37-91b7-98ab0dd47183" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019f055a-0f33-745c-ad7b-6d25988ef50a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019f055a-0f33-745c-ad7b-6d25988ef50a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019f055a-0f33-729c-bfa6-d2ef313c4ea2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019f055a-0f33-729c-bfa6-d2ef313c4ea2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019f055a-0f33-7747-8fca-4ad724687fdc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f055a-0f33-7cf5-974a-a3596696aac5" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019f055a-0f33-7747-8fca-4ad724687fdc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/FairValueMeasurementsFairValueofFinancialAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#FairValueMeasurementsFairValueofFinancialAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/FairValueMeasurementsFairValueofFinancialAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019f055a-0f33-72ad-a97b-7005136408c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_01a034a0-d6f2-796b-9dc3-ad23a4f635a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019f055a-0f33-72ad-a97b-7005136408c1" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_01a034a0-d6f2-796b-9dc3-ad23a4f635a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DeferredCompensationLiabilityNonCurrentFairValue_019f055a-0f33-755f-87cf-714a89e195e1" xlink:href="panw-20260731.xsd#panw_DeferredCompensationLiabilityNonCurrentFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019f055a-0f33-72ad-a97b-7005136408c1" xlink:to="loc_panw_DeferredCompensationLiabilityNonCurrentFairValue_019f055a-0f33-755f-87cf-714a89e195e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_019f055a-0f33-78f2-8fd5-2e334b200d65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019f378b-ed04-7011-9a81-f14e66e56f98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsFairValueDisclosure_019f055a-0f33-78f2-8fd5-2e334b200d65" xlink:to="loc_us-gaap_DerivativeAssets_019f378b-ed04-7011-9a81-f14e66e56f98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019f055a-0f33-7b85-98f3-bcf0720c61c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsFairValueDisclosure_019f055a-0f33-78f2-8fd5-2e334b200d65" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019f055a-0f33-7b85-98f3-bcf0720c61c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019f055a-0f33-71fd-8619-2825eef8bcc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-763c-b206-d3aaaf18d690" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_019f055a-0f33-71fd-8619-2825eef8bcc4" xlink:to="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-763c-b206-d3aaaf18d690" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019f378b-6a6e-7715-88a5-e491a8799b22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_019f055a-0f33-71fd-8619-2825eef8bcc4" xlink:to="loc_us-gaap_LongTermDebtFairValue_019f378b-6a6e-7715-88a5-e491a8799b22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019f378b-6a6e-7c03-88ef-1453b4e63b33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_019f055a-0f33-71fd-8619-2825eef8bcc4" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019f378b-6a6e-7c03-88ef-1453b4e63b33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-75bf-98d2-ddcc9931e52d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_019f055a-0f33-7ee6-addb-8d776e49646a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-75bf-98d2-ddcc9931e52d" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_019f055a-0f33-7ee6-addb-8d776e49646a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DeferredCompensationLiabilityCurrentFairValue_019f378a-4830-7722-a69d-4cbfe730746f" xlink:href="panw-20260731.xsd#panw_DeferredCompensationLiabilityCurrentFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-75bf-98d2-ddcc9931e52d" xlink:to="loc_panw_DeferredCompensationLiabilityCurrentFairValue_019f378a-4830-7722-a69d-4cbfe730746f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_01a034a0-b0b4-7d7b-a4ec-99fee2d9f7de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesFairValueDisclosure_019f055a-0f33-75bf-98d2-ddcc9931e52d" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_01a034a0-b0b4-7d7b-a4ec-99fee2d9f7de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure_019f055a-0f33-7850-8769-1844d621e131" xlink:href="panw-20260731.xsd#panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_019f055a-0f33-756e-bc40-7ac8b92e6757" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure_019f055a-0f33-7850-8769-1844d621e131" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_019f055a-0f33-756e-bc40-7ac8b92e6757" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019f055a-0f33-7cc1-a29c-7c4cc10fe50e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_019f055a-0f33-73c6-9b94-c918d40c77f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019f055a-0f33-7cc1-a29c-7c4cc10fe50e" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_019f055a-0f33-73c6-9b94-c918d40c77f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019f055a-0f33-758c-81c6-4d05b255c231" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019f055a-0f33-7cc1-a29c-7c4cc10fe50e" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019f055a-0f33-758c-81c6-4d05b255c231" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019f055a-0f33-7686-96d4-1dcc45ce0be6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019f055a-0f33-7cc1-a29c-7c4cc10fe50e" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019f055a-0f33-7686-96d4-1dcc45ce0be6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure_019f055a-0f33-76cb-9b37-444134ff86da" xlink:href="panw-20260731.xsd#panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019f055a-0f33-7cc1-a29c-7c4cc10fe50e" xlink:to="loc_panw_PrepaidExpensesandOtherCurrentAssetsFairValueDisclosure_019f055a-0f33-76cb-9b37-444134ff86da" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-7a3d-a1fa-02db964e9401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019f055a-0f33-7a9c-bfe0-843501681580" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-7a3d-a1fa-02db964e9401" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019f055a-0f33-7a9c-bfe0-843501681580" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f33-7384-9877-4dac7962620b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-7a3d-a1fa-02db964e9401" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f33-7384-9877-4dac7962620b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019f055a-0f33-76bc-b4a9-c968c8084510" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-7a3d-a1fa-02db964e9401" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019f055a-0f33-76bc-b4a9-c968c8084510" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesContractualMaturitiesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesContractualMaturitiesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CashEquivalentsandInvestmentsAvailableforSaleDebtSecuritiesContractualMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsFairValue_019f055a-0f34-7dee-9a06-7dafef466c2e" xlink:href="panw-20260731.xsd#panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:to="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsFairValue_019f055a-0f34-7dee-9a06-7dafef466c2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsFairValue_019f055a-0f34-7add-b09e-1140195d9ab1" xlink:href="panw-20260731.xsd#panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:to="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsFairValue_019f055a-0f34-7add-b09e-1140195d9ab1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_019f055a-0f34-7fff-81f8-aecde4307380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_019f055a-0f34-7fff-81f8-aecde4307380" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_019f055a-0f34-70c8-90a3-8658e9c044fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_019f055a-0f34-70c8-90a3-8658e9c044fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019f055a-0f34-7ade-b827-6071fa7500bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019f055a-0f34-76b2-8b56-bc7c010fd7fe" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019f055a-0f34-7ade-b827-6071fa7500bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsAmortizedCost_019f055a-0f33-71bb-9b5b-75d23bd891a7" xlink:href="panw-20260731.xsd#panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsAmortizedCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:to="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterThreeThroughFiveYearsAmortizedCost_019f055a-0f33-71bb-9b5b-75d23bd891a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsAmortizedCost_019f055a-0f33-7a99-a531-253a69f8c0f5" xlink:href="panw-20260731.xsd#panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsAmortizedCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:to="loc_panw_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateRollingAfterOneThroughThreeYearsAmortizedCost_019f055a-0f33-7a99-a531-253a69f8c0f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_019f055a-0f33-7890-aff0-036eabe5c406" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_019f055a-0f33-7890-aff0-036eabe5c406" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_019f055a-0f34-72b8-9dd8-7055e11995a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_019f055a-0f34-72b8-9dd8-7055e11995a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_019f055a-0f34-7c76-8073-6589ad61e2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019f055a-0f33-75da-b260-8213bab3152d" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_019f055a-0f34-7c76-8073-6589ad61e2ce" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/FinancingReceivablesShortandLongtermFinancingReceivablesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#FinancingReceivablesShortandLongtermFinancingReceivablesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/FinancingReceivablesShortandLongtermFinancingReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f34-708e-9902-9350835294dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableGrossNoncurrent_019f055a-0f34-7d1e-84a5-a85648efc4f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableGrossNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f34-708e-9902-9350835294dc" xlink:to="loc_us-gaap_NotesAndLoansReceivableGrossNoncurrent_019f055a-0f34-7d1e-84a5-a85648efc4f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_FinancingReceivableUnearnedIncomeBeforeAllowanceForCreditLossNoncurrent_019f055a-0f34-728f-982a-5ce037c50170" xlink:href="panw-20260731.xsd#panw_FinancingReceivableUnearnedIncomeBeforeAllowanceForCreditLossNoncurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f34-708e-9902-9350835294dc" xlink:to="loc_panw_FinancingReceivableUnearnedIncomeBeforeAllowanceForCreditLossNoncurrent_019f055a-0f34-728f-982a-5ce037c50170" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_019f055a-0f34-7647-b971-d5fc8145ff16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019f055a-0f34-708e-9902-9350835294dc" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_019f055a-0f34-7647-b971-d5fc8145ff16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f34-70bd-b9c2-45ecfd6959dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_FinancingReceivableUnamortizedLoanCostFeeCurrent_019f055a-0f34-78ae-87ba-34e01de3417b" xlink:href="panw-20260731.xsd#panw_FinancingReceivableUnamortizedLoanCostFeeCurrent"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f34-70bd-b9c2-45ecfd6959dd" xlink:to="loc_panw_FinancingReceivableUnamortizedLoanCostFeeCurrent_019f055a-0f34-78ae-87ba-34e01de3417b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019f055a-0f34-7f73-b8de-d87f77c2fa69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForNotesAndLoansReceivableCurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f34-70bd-b9c2-45ecfd6959dd" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019f055a-0f34-7f73-b8de-d87f77c2fa69" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableGrossCurrent_019f055a-0f34-7ab0-89f6-6eb1ed176e71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesAndLoansReceivableGrossCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019f055a-0f34-70bd-b9c2-45ecfd6959dd" xlink:to="loc_us-gaap_NotesAndLoansReceivableGrossCurrent_019f055a-0f34-7ab0-89f6-6eb1ed176e71" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/FinancingReceivablesInternalCreditRiskDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#FinancingReceivablesInternalCreditRiskDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/FinancingReceivablesInternalCreditRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_019f055a-0f34-77d9-aecf-9bf472231f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_019f055a-0f34-77d9-aecf-9bf472231f6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_019f055a-0f34-7087-8aa5-517411092fdf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_019f055a-0f34-7087-8aa5-517411092fdf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_019f055a-0f34-73d7-974c-a86b1114207e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:to="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_019f055a-0f34-73d7-974c-a86b1114207e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_019f055a-0f34-76c4-bf13-c31f19c98841" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:to="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_019f055a-0f34-76c4-bf13-c31f19c98841" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_019f055a-0f34-7219-ac4e-c5b627eced66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableGross_019f055a-0f34-7ffd-8fb2-6c9f8f1fbb44" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_019f055a-0f34-7219-ac4e-c5b627eced66" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/AcquisitionsScheduleofPurchaseConsiderationDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#AcquisitionsScheduleofPurchaseConsiderationDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/AcquisitionsScheduleofPurchaseConsiderationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019f055a-0f34-75e9-9608-5cd74da9232e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019f055a-0f34-72d1-a6fc-5ca5763ee2ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019f055a-0f34-75e9-9608-5cd74da9232e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019f055a-0f34-72d1-a6fc-5ca5763ee2ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019f055a-0f34-72c9-a4e9-56886b5153b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019f055a-0f34-75e9-9608-5cd74da9232e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019f055a-0f34-72c9-a4e9-56886b5153b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019f3858-2eba-7079-8177-00a895e02bce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019f055a-0f34-75e9-9608-5cd74da9232e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019f3858-2eba-7079-8177-00a895e02bce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_BusinessCombinationConsiderationTransferredReturned_019f055a-0f34-7bd3-abac-a0c748e11b35" xlink:href="panw-20260731.xsd#panw_BusinessCombinationConsiderationTransferredReturned"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019f055a-0f34-75e9-9608-5cd74da9232e" xlink:to="loc_panw_BusinessCombinationConsiderationTransferredReturned_019f055a-0f34-7bd3-abac-a0c748e11b35" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/AcquisitionPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#AcquisitionPurchasePriceAllocationDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/AcquisitionPurchasePriceAllocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019f385a-643a-79ce-8fbe-a6c5e6ced31f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_Goodwill_019f385a-643a-79ce-8fbe-a6c5e6ced31f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019f385b-df35-726f-8fcf-43fc514ba3d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019f385b-df35-726f-8fcf-43fc514ba3d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019f385a-643a-72b7-9915-d7e41d9bc658" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019f385a-643a-72b7-9915-d7e41d9bc658" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019f385a-643a-7739-9fc0-165ee084f187" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019f385a-643a-7739-9fc0-165ee084f187" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019f385a-643a-79ab-b008-c1cab8a73cc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019f385a-643a-79ab-b008-c1cab8a73cc3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_BusinessCombinationRecognizedAssetAcquiredShortTermAndLongTermInvestments_019f385b-8db3-703c-a1c5-1f474c5d2c3c" xlink:href="panw-20260731.xsd#panw_BusinessCombinationRecognizedAssetAcquiredShortTermAndLongTermInvestments"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_panw_BusinessCombinationRecognizedAssetAcquiredShortTermAndLongTermInvestments_019f385b-8db3-703c-a1c5-1f474c5d2c3c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019f385b-8db3-74df-9364-c43fc85a0ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019f385b-8db3-74df-9364-c43fc85a0ad7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_019f385b-8db3-7f38-aa28-d64ac1ae4de4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_019f385b-8db3-7f38-aa28-d64ac1ae4de4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_BusinessCombinationRecognizedAssetAcquiredDeferredRevenue_019f385b-8db3-7ea0-a568-bb8b625e9fa8" xlink:href="panw-20260731.xsd#panw_BusinessCombinationRecognizedAssetAcquiredDeferredRevenue"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_panw_BusinessCombinationRecognizedAssetAcquiredDeferredRevenue_019f385b-8db3-7ea0-a568-bb8b625e9fa8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019f385b-8db3-721f-880d-6b7ad46077b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019f385a-643a-7583-82a6-45b2cb15a2c0" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019f385b-8db3-721f-880d-6b7ad46077b8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019f055a-0ff4-7c6e-b06f-912005f2aeb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-78ba-8a81-a6e2fb6feaab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019f055a-0ff4-7c6e-b06f-912005f2aeb8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-78ba-8a81-a6e2fb6feaab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-7596-86a6-75e385a238bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f055a-0ff4-72a9-b2a0-3099adc19fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-7596-86a6-75e385a238bd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f055a-0ff4-72a9-b2a0-3099adc19fb1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f055a-0ff4-7a35-85b9-50c2826e1917" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-7596-86a6-75e385a238bd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f055a-0ff4-7a35-85b9-50c2826e1917" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019f055a-0ff4-721e-9805-3f7252b4d040" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f055a-0ff4-7ff8-95e1-250086ae919e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019f055a-0ff4-721e-9805-3f7252b4d040" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f055a-0ff4-7ff8-95e1-250086ae919e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails_1" xlink:type="simple" xlink:href="panw-20260731.xsd#GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails_1"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsPurchasedIntangibleAssetsbyMajorClassDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019f055a-0ff4-7026-a5ce-bceead68ec5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f055a-0ff4-7f44-91fe-5b7adac69ba1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019f055a-0ff4-7026-a5ce-bceead68ec5f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f055a-0ff4-7f44-91fe-5b7adac69ba1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019f055a-0ff4-76ff-b9a1-d587e68dfa97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019f055a-0ff4-7026-a5ce-bceead68ec5f" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019f055a-0ff4-76ff-b9a1-d587e68dfa97" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsFutureAmortizationExpenseofIntangibleAssetsDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#GoodwillandIntangibleAssetsFutureAmortizationExpenseofIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/GoodwillandIntangibleAssetsFutureAmortizationExpenseofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019f055a-0ff4-7785-bccc-262afc6309d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019f055a-0ff4-7785-bccc-262afc6309d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019f055a-0ff4-7257-bdd0-4dc17a69d2cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019f055a-0ff4-7257-bdd0-4dc17a69d2cd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019f055a-0ff4-7d82-88da-ba90bcd023c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019f055a-0ff4-7d82-88da-ba90bcd023c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019f055a-0ff4-7df9-af63-041dd6d95600" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019f055a-0ff4-7df9-af63-041dd6d95600" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019f055a-0ff4-7dbe-9d78-c8cd78351398" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019f055a-0ff4-7dbe-9d78-c8cd78351398" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019f055a-0ff4-78df-876b-679f2e49d9ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f055a-0ff4-71dd-9903-29e3a0b675cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019f055a-0ff4-78df-876b-679f2e49d9ae" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/PropertyandEquipmentPropertyandEquipmentbyTypeDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#PropertyandEquipmentPropertyandEquipmentbyTypeDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/PropertyandEquipmentPropertyandEquipmentbyTypeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019f055a-0ff4-79c4-a4bd-71c2e6dca1b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019f055a-0ff4-76e9-b2fe-fd02bf7607fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019f055a-0ff4-79c4-a4bd-71c2e6dca1b9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019f055a-0ff4-76e9-b2fe-fd02bf7607fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019f055a-0ff4-78a0-b883-d2bac8a52165" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019f055a-0ff4-79c4-a4bd-71c2e6dca1b9" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019f055a-0ff4-78a0-b883-d2bac8a52165" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/DebtScheduleofInterestExpenseRecognizedDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#DebtScheduleofInterestExpenseRecognizedDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/DebtScheduleofInterestExpenseRecognizedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019f055a-0ff4-7b2f-95a2-7c91d2844a59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019f055a-0ff4-7154-aebe-28df1209b8c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseDebt_019f055a-0ff4-7b2f-95a2-7c91d2844a59" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019f055a-0ff4-7154-aebe-28df1209b8c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019f055a-0ff4-70eb-a82e-9fbc3edc65f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseDebt_019f055a-0ff4-7b2f-95a2-7c91d2844a59" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019f055a-0ff4-70eb-a82e-9fbc3edc65f1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-729e-a022-0906a9148e87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019f055a-0ff5-75b8-9366-599162b67bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-729e-a022-0906a9148e87" xlink:to="loc_us-gaap_OperatingLeaseLiability_019f055a-0ff5-75b8-9366-599162b67bf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019f055a-0ff5-7679-904b-3a89cb32e265" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-729e-a022-0906a9148e87" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019f055a-0ff5-7679-904b-3a89cb32e265" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019f055a-0ff5-7aed-9a8b-39e6e1e017fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f055a-0ff5-71e7-9ff6-606f7cb6dea3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_019f055a-0ff5-7aed-9a8b-39e6e1e017fe" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f055a-0ff5-71e7-9ff6-606f7cb6dea3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019f055a-0ff5-7130-897b-ffefa9d1a737" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_019f055a-0ff5-7aed-9a8b-39e6e1e017fe" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019f055a-0ff5-7130-897b-ffefa9d1a737" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="panw-20260731.xsd#LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/LeasesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019f055a-0ff5-7d59-9fca-a20fc458ea9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019f055a-0ff5-7d59-9fca-a20fc458ea9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019f055a-0ff5-7231-94a6-2f317d972f25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019f055a-0ff5-7231-94a6-2f317d972f25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019f055a-0ff5-76e8-8016-6264d9eed288" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019f055a-0ff5-76e8-8016-6264d9eed288" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019f055a-0ff5-7b2c-84c6-0c0be4a8b408" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019f055a-0ff5-7b2c-84c6-0c0be4a8b408" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019f055a-0ff5-7000-9098-23677c78ec16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019f055a-0ff5-7000-9098-23677c78ec16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019f055a-0ff5-75e2-b668-a75376f08f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019f055a-0ff5-723c-a9bb-147cf5144b59" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019f055a-0ff5-75e2-b668-a75376f08f7e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/CommitmentsandContingenciesPurchaseCommitmentsDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#CommitmentsandContingenciesPurchaseCommitmentsDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/CommitmentsandContingenciesPurchaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_019f055a-0ff5-7a38-aa8e-151066d6cd21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_019f055a-0ff5-7a38-aa8e-151066d6cd21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_019f055a-0ff5-7e3a-8041-fdca2efa76ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_019f055a-0ff5-7e3a-8041-fdca2efa76ec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_019f055a-0ff5-7f01-b01f-34b552203043" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_019f055a-0ff5-7f01-b01f-34b552203043" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_019f055a-0ff5-7adf-af51-e100958388cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_019f055a-0ff5-7adf-af51-e100958388cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_019f055a-0ff5-7336-ac29-07b85ea2c896" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_019f055a-0ff5-7336-ac29-07b85ea2c896" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_019f055a-0ff5-7d92-b5da-60a276df26be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f055a-0ff5-7b41-b241-9b2771783ff8" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_019f055a-0ff5-7d92-b5da-60a276df26be" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsofIncomeBeforeIncomeTaxesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#IncomeTaxesScheduleofComponentsofIncomeBeforeIncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsofIncomeBeforeIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0ff5-7199-bc9c-6ae81d6e390d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019f055a-0ff5-7434-9a9c-b2d40dfb4aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0ff5-7199-bc9c-6ae81d6e390d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019f055a-0ff5-7434-9a9c-b2d40dfb4aaf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_019f055a-0ff5-7b05-aa3a-4af2b0e81e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f055a-0ff5-7199-bc9c-6ae81d6e390d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_019f055a-0ff5-7b05-aa3a-4af2b0e81e4a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxExpenseBenefitDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#IncomeTaxesScheduleofComponentsofIncomeTaxExpenseBenefitDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_019f055a-0ff5-70e3-b1a5-e5e174cc59ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_019f055a-0ff5-70e3-b1a5-e5e174cc59ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_019f055a-0ff5-7051-a29d-acf1796f72cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_019f055a-0ff5-7051-a29d-acf1796f72cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_019f055a-0ff5-7571-b185-86872f85b386" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_019f055a-0ff5-7571-b185-86872f85b386" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_019f055a-0ff5-70a3-aada-3ada26d64dba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_019f055a-0ff5-70a3-aada-3ada26d64dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_019f055a-0ff5-7048-a729-95be2a19df10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_019f055a-0ff5-7048-a729-95be2a19df10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019f055a-0ff5-7fca-b6d7-d396b48c9342" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019f055a-0ff5-75a0-a1cf-06e965259c3f" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019f055a-0ff5-7fca-b6d7-d396b48c9342" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofEffectiveTaxRateReconciliationDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#IncomeTaxesScheduleofEffectiveTaxRateReconciliationDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofEffectiveTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019f055a-0ff5-77c0-99cb-e86c0e7f8b49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019f055a-0ff5-77c0-99cb-e86c0e7f8b49" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_01a03501-20ed-7a56-8db2-7bd09cd0562c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_01a03501-20ed-7a56-8db2-7bd09cd0562c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_01a03500-edc3-74b6-862c-e8d922aeaad2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_01a03500-edc3-74b6-862c-e8d922aeaad2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019f055a-0ff5-79d1-8fd5-cf8d197c33f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019f055a-0ff5-79d1-8fd5-cf8d197c33f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019f055a-0ff5-7d4b-83ed-4bb1cde032f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019f055a-0ff5-7d4b-83ed-4bb1cde032f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_019f055a-0ff5-7100-a48b-c9a914d68157" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_019f055a-0ff5-7100-a48b-c9a914d68157" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_019f055a-0ff5-7897-8622-14bddde7e355" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_019f055a-0ff5-7897-8622-14bddde7e355" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019f055a-0ff5-7f96-a1c1-4f6b08c957b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019f055a-0ff5-7f96-a1c1-4f6b08c957b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019f055a-0ff5-714d-a723-32deef3e0362" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019f055a-0ff5-714d-a723-32deef3e0362" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossPercent_019f055a-0ff5-7e96-ab70-3d7cda9e7dff" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossPercent"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossPercent_019f055a-0ff5-7e96-ab70-3d7cda9e7dff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomePercent_01a03500-71e3-74ed-800e-aac33b103402" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomePercent"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomePercent_01a03500-71e3-74ed-800e-aac33b103402" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialPercent_01a05706-f7f1-7cc2-9c23-9e3e04313909" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialPercent"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialPercent_01a05706-f7f1-7cc2-9c23-9e3e04313909" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_01a03500-71e3-7002-951f-78238e0d0d61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_01a03500-71e3-7002-951f-78238e0d0d61" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_01a03500-71e3-7eea-9b6e-1cf74b57013a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_01a03500-71e3-7eea-9b6e-1cf74b57013a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_01a03500-71e3-7402-b2a7-26880e90b078" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_01a03500-71e3-7402-b2a7-26880e90b078" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_01a03500-71e3-78c9-b8e4-417f021e315a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_01a03500-71e3-78c9-b8e4-417f021e315a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsPercent_01a03500-71e3-7298-8cec-6f95339ed9a3" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsPercent"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsPercent_01a03500-71e3-7298-8cec-6f95339ed9a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_01a03500-71e3-7229-a00f-d7de8ef76722" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_01a03500-71e3-7229-a00f-d7de8ef76722" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringPercent_01a03500-71e3-7944-a27c-6a546cbce00c" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringPercent"/>
    <link:calculationArc order="19" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019f055a-0ff5-7c54-a9e2-1f8588cd6512" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringPercent_01a03500-71e3-7944-a27c-6a546cbce00c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_01a034c4-2d7d-7aad-a5d8-e7776a407fff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_01a034c4-2d7d-7aad-a5d8-e7776a407fff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialAmount_01a05706-a9cd-7a69-a315-a2ecc9c3f4da" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateReducedStatutoryRateDifferentialAmount_01a05706-a9cd-7a69-a315-a2ecc9c3f4da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_01a034c4-2d7d-732d-9793-ac166845750d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_01a034c4-2d7d-732d-9793-ac166845750d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_01a034c4-2d7d-7281-ac3e-88daf319227e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_01a034c4-2d7d-7281-ac3e-88daf319227e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_01a034c4-2d7d-7770-895a-1931d1e6c50b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_01a034c4-2d7d-7770-895a-1931d1e6c50b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges_01a034c4-2d7d-7cdb-9487-440e3c4ac798" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges_01a034c4-2d7d-7cdb-9487-440e3c4ac798" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_01a034c4-2d7d-72cf-ac4c-9ed84465fb99" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_01a034c4-2d7d-72cf-ac4c-9ed84465fb99" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossAmount_01a034c4-2d7d-7736-abf5-1a022cc6b3bd" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossAmount"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderBranchIncomeLossAmount_01a034c4-2d7d-7736-abf5-1a022cc6b3bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomeAmount_01a034c4-2d7d-7122-b104-27f1e678c771" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomeAmount"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationCrossBorderSubpartFIncomeAmount_01a034c4-2d7d-7122-b104-27f1e678c771" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_01a034c4-2d7d-7f40-9893-8454ca6001d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_01a034c4-2d7d-7f40-9893-8454ca6001d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_01a034c4-2d7d-73c1-8bb2-418e8780e8b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_01a034c4-2d7d-73c1-8bb2-418e8780e8b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_01a034c4-2d7d-7498-a800-b0b85c28d739" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_01a034c4-2d7d-7498-a800-b0b85c28d739" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_01a034c4-2d7d-7728-bfcf-4b65e7209691" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_01a034c4-2d7d-7728-bfcf-4b65e7209691" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsAmount_01a034c4-2d7d-7d5d-be41-ac04819b23cc" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsAmount"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseConvertibleDebtFairMarketValueAdjustmentsAmount_01a034c4-2d7d-7d5d-be41-ac04819b23cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_01a034c4-2d7d-7970-8e53-b3dd2d98d611" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_01a034c4-2d7d-7970-8e53-b3dd2d98d611" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringAmount_01a034c4-2d7d-701c-9741-3203b8477301" xlink:href="panw-20260731.xsd#panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringAmount"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_01a034c4-2d7d-7529-98a8-635b8cdceead" xlink:to="loc_panw_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRestructuringAmount_01a034c4-2d7d-701c-9741-3203b8477301" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsoftheDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#IncomeTaxesScheduleofComponentsoftheDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofComponentsoftheDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_019f055a-0ff5-74b2-9386-b9750d7b5184" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_019f055a-0ff5-74b2-9386-b9750d7b5184" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DeferredTaxAssetsFixedAssetsAndIntangibleAssets_019f055a-0ff5-733f-90b6-15b0a0be00fe" xlink:href="panw-20260731.xsd#panw_DeferredTaxAssetsFixedAssetsAndIntangibleAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_panw_DeferredTaxAssetsFixedAssetsAndIntangibleAssets_019f055a-0ff5-733f-90b6-15b0a0be00fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_019f055a-0ff5-7026-a3ad-7a07fa85cc5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_019f055a-0ff5-7026-a3ad-7a07fa85cc5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_019f055a-0ff5-7888-95cd-91ed54ecd50c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_019f055a-0ff5-7888-95cd-91ed54ecd50c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_019f055a-0ff5-7b4b-955a-4f59f0f47202" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_019f055a-0ff5-7b4b-955a-4f59f0f47202" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_019f055a-0ff5-7ec6-b61a-9802a05c992d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsDeferredIncome"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_019f055a-0ff5-7ec6-b61a-9802a05c992d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DeferredTaxAssetsOperatingLeaseLiabilities_019f055a-0ff5-78cd-84b9-8262b211f057" xlink:href="panw-20260731.xsd#panw_DeferredTaxAssetsOperatingLeaseLiabilities"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_panw_DeferredTaxAssetsOperatingLeaseLiabilities_019f055a-0ff5-78cd-84b9-8262b211f057" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_019f055a-0ff5-745f-95df-0d0c097fd63c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7652-95cf-413e6cee0512" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_019f055a-0ff5-745f-95df-0d0c097fd63c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_019f055a-0ff5-705c-9479-677ea4c106b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7236-a860-bf68aeb5326f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_019f055a-0ff5-705c-9479-677ea4c106b0" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_019f055a-0ff5-7236-a860-bf68aeb5326f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019f055a-0ff5-70ce-9f57-012274d8c8c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_019f055a-0ff5-705c-9479-677ea4c106b0" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019f055a-0ff5-70ce-9f57-012274d8c8c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019f055a-0ff5-72e1-b20e-1f3f2dc00731" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-74b3-9f51-b51f126a2d6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019f055a-0ff5-72e1-b20e-1f3f2dc00731" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-74b3-9f51-b51f126a2d6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_019f055a-0ff5-78ee-88cd-5e68767f9ca8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019f055a-0ff5-72e1-b20e-1f3f2dc00731" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_019f055a-0ff5-78ee-88cd-5e68767f9ca8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-7c23-8567-5395fb86fc58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_DeferredTaxLiabilitiesDomesticEffectOfForeignTaxAssets_019f055a-0ff5-7292-b74e-63b75f8ce5a8" xlink:href="panw-20260731.xsd#panw_DeferredTaxLiabilitiesDomesticEffectOfForeignTaxAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-7c23-8567-5395fb86fc58" xlink:to="loc_panw_DeferredTaxLiabilitiesDomesticEffectOfForeignTaxAssets_019f055a-0ff5-7292-b74e-63b75f8ce5a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_019f055a-0ff5-7d1c-a71c-2df0b19d12b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-7c23-8567-5395fb86fc58" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_019f055a-0ff5-7d1c-a71c-2df0b19d12b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_019f055a-0ff5-797e-9764-80132a2c628d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-7c23-8567-5395fb86fc58" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_019f055a-0ff5-797e-9764-80132a2c628d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_01a03428-a7d1-78fb-8270-9b01514b59a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019f055a-0ff5-7c23-8567-5395fb86fc58" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_01a03428-a7d1-78fb-8270-9b01514b59a7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofCashFlowSupplementalDisclosuresDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#IncomeTaxesScheduleofCashFlowSupplementalDisclosuresDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/IncomeTaxesScheduleofCashFlowSupplementalDisclosuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_01a03547-9e8d-77d8-9c3e-b5a676d79481" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_01a03547-9e8d-7dec-bf98-70b3ebba4a84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_01a03547-9e8d-77d8-9c3e-b5a676d79481" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_01a03547-9e8d-7dec-bf98-70b3ebba4a84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_01a03547-9e8d-7a06-a0d4-612704a95124" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_01a03547-9e8d-77d8-9c3e-b5a676d79481" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_01a03547-9e8d-7a06-a0d4-612704a95124" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_01a03547-9e8d-7692-8f53-973da2c632d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_01a03547-9e8d-77d8-9c3e-b5a676d79481" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_01a03547-9e8d-7692-8f53-973da2c632d9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/NetIncomePerShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#NetIncomePerShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/NetIncomePerShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019f055a-0ff5-7c62-a03f-615951cf72b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019f055a-0ff5-7301-af50-afb82fb1fd78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019f055a-0ff5-7c62-a03f-615951cf72b2" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019f055a-0ff5-7301-af50-afb82fb1fd78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_019f055a-0ff5-7fda-8453-3a6e08e2bc5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019f055a-0ff5-7c62-a03f-615951cf72b2" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_019f055a-0ff5-7fda-8453-3a6e08e2bc5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_019f055a-0ff5-750f-82bf-3dd7f6a5470e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019f055a-0ff5-7c62-a03f-615951cf72b2" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_019f055a-0ff5-750f-82bf-3dd7f6a5470e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019f055a-0ff5-7fda-aaba-5312568aea89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019f055a-0ff5-7c62-a03f-615951cf72b2" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019f055a-0ff5-7fda-aaba-5312568aea89" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.paloaltonetworks.com/role/OtherIncomeExpenseNetDetails" xlink:type="simple" xlink:href="panw-20260731.xsd#OtherIncomeExpenseNetDetails"/>
  <link:calculationLink xlink:role="http://www.paloaltonetworks.com/role/OtherIncomeExpenseNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:href="panw-20260731.xsd#panw_OtherNonoperatingIncomeExpenseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_019f055a-0ff5-7112-9380-05acd875edb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeOther"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_us-gaap_InterestIncomeOther_019f055a-0ff5-7112-9380-05acd875edb8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019f055a-0ff5-7132-86bb-a11301e6da72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019f055a-0ff5-7132-86bb-a11301e6da72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019f055a-0ff5-7a9a-9259-0cc4db44f338" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019f055a-0ff5-7a9a-9259-0cc4db44f338" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_panw_ChangeInFairValueOfConvertibleSeniorNotes_019fa90c-d3d9-737c-acd3-551a66852f09" xlink:href="panw-20260731.xsd#panw_ChangeInFairValueOfConvertibleSeniorNotes"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_panw_ChangeInFairValueOfConvertibleSeniorNotes_019fa90c-d3d9-737c-acd3-551a66852f09" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019fa90c-d3d9-76ad-bec5-efd1c0885ea2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019fa90c-d3d9-76ad-bec5-efd1c0885ea2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019fa90c-d3d9-7207-9d01-8c0b23d97b30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_panw_OtherNonoperatingIncomeExpenseNet_019f055a-0ff5-75c3-83f1-0c28b1960caf" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019fa90c-d3d9-7207-9d01-8c0b23d97b30" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
