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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ed15e-edce-7dc6-af4c-e397379f92a6,g:2e483d47-1787-4d08-af52-e67bf288fe42-->
<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://portillos.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUNAUDITED" xlink:type="simple" xlink:href="ptlo-20260628.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSUNAUDITED"/>
  <link:calculationLink xlink:role="http://portillos.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUNAUDITED" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-7508-a51f-ec086b0b86dd" 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_AccountsNotesAndLoansReceivableNetCurrent_019ed15e-ee9f-7c01-8535-6b1c303d3869" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-7508-a51f-ec086b0b86dd" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_019ed15e-ee9f-7c01-8535-6b1c303d3869" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019ed15e-ee9f-724b-9316-580d52fdf906" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-7508-a51f-ec086b0b86dd" xlink:to="loc_us-gaap_InventoryNet_019ed15e-ee9f-724b-9316-580d52fdf906" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ed15e-ee9f-7a3d-b7fd-3b412d55a274" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-7508-a51f-ec086b0b86dd" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ed15e-ee9f-7a3d-b7fd-3b412d55a274" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ed15e-ee9f-70db-94c2-3be1bc88a5b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-7508-a51f-ec086b0b86dd" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ed15e-ee9f-70db-94c2-3be1bc88a5b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019ed15e-ee9f-729a-b457-ba912ca0b5fe" 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_OtherAssetsNoncurrent_019ed15e-ee9f-7577-952d-88f8fecfab47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ed15e-ee9f-729a-b457-ba912ca0b5fe" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-7577-952d-88f8fecfab47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-702f-ac74-0d560bfa51c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ed15e-ee9f-729a-b457-ba912ca0b5fe" xlink:to="loc_us-gaap_AssetsCurrent_019ed15e-ee9f-702f-ac74-0d560bfa51c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019ed15e-ee9f-7ac2-813b-9c4f2f8b2bf6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ed15e-ee9f-729a-b457-ba912ca0b5fe" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019ed15e-ee9f-7ac2-813b-9c4f2f8b2bf6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ed15e-ee9f-76c9-849f-9696283f6e68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ed15e-ee9f-729a-b457-ba912ca0b5fe" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ed15e-ee9f-76c9-849f-9696283f6e68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ed15e-ee9f-7521-a1c8-5f7dcbd0a077" 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_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-79cb-99fc-59bcd6f88696" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ed15e-ee9f-7521-a1c8-5f7dcbd0a077" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-79cb-99fc-59bcd6f88696" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019ed15e-ee9f-7c76-b146-73175ee56805" 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_019ed15e-ee9f-7521-a1c8-5f7dcbd0a077" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019ed15e-ee9f-7c76-b146-73175ee56805" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ed15e-ee9f-76ae-b641-8916e88c0c51" 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_019ed15e-ee9f-7521-a1c8-5f7dcbd0a077" xlink:to="loc_us-gaap_Liabilities_019ed15e-ee9f-76ae-b641-8916e88c0c51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" 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_019ed15e-ee9f-7494-a464-a5157b9d6603" 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_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_AccountsPayableCurrent_019ed15e-ee9f-7494-a464-a5157b9d6603" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ed15e-ee9f-7281-9562-38bf8d877167" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ed15e-ee9f-7281-9562-38bf8d877167" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019ed15e-ee9f-773f-96db-5808680c7ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_ShortTermBorrowings_019ed15e-ee9f-773f-96db-5808680c7ecb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019ed15e-ee9f-7b4c-9d2b-51a9ba06b461" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019ed15e-ee9f-7b4c-9d2b-51a9ba06b461" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_TaxReceivableAgreementLiabilityCurrent_019ed15e-ee9f-777b-a569-c801bcb61850" xlink:href="ptlo-20260628.xsd#ptlo_TaxReceivableAgreementLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_ptlo_TaxReceivableAgreementLiabilityCurrent_019ed15e-ee9f-777b-a569-c801bcb61850" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ed15e-ee9f-763c-8d3e-2f574b5ef03f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ed15e-ee9f-763c-8d3e-2f574b5ef03f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019ed15e-ee9f-730a-b94d-1eb7ac79b70b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-7057-a08d-29fda00a87f3" xlink:to="loc_us-gaap_LongTermDebtCurrent_019ed15e-ee9f-730a-b94d-1eb7ac79b70b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-70d6-86ee-b5e872fb512e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019ed15e-ee9f-7ced-8915-69dd3a2d9dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-70d6-86ee-b5e872fb512e" xlink:to="loc_us-gaap_MinorityInterest_019ed15e-ee9f-7ced-8915-69dd3a2d9dd4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-7047-8134-349da3a2e9ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-70d6-86ee-b5e872fb512e" xlink:to="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-7047-8134-349da3a2e9ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-797f-aa1c-62c6255c57be" 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_CommonStockValue_019ed15e-ee9f-760c-8d65-9728ae05f0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-797f-aa1c-62c6255c57be" xlink:to="loc_us-gaap_CommonStockValue_019ed15e-ee9f-760c-8d65-9728ae05f0d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019ed15e-ee9f-7fd7-bf10-7039f33a7ea3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-797f-aa1c-62c6255c57be" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019ed15e-ee9f-7fd7-bf10-7039f33a7ea3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019ed15e-ee9f-738a-aac9-ae4f666d1c0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-797f-aa1c-62c6255c57be" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019ed15e-ee9f-738a-aac9-ae4f666d1c0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019ed15e-ee9f-7ba1-b00c-f8cc903fe8fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ed15e-ee9f-797f-aa1c-62c6255c57be" xlink:to="loc_us-gaap_PreferredStockValue_019ed15e-ee9f-7ba1-b00c-f8cc903fe8fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ed15e-ee9f-7068-925e-44859559337f" 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_019ed15e-ee9f-75ed-87cf-61270568f4ca" 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_019ed15e-ee9f-7068-925e-44859559337f" xlink:to="loc_us-gaap_LiabilitiesCurrent_019ed15e-ee9f-75ed-87cf-61270568f4ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7abd-a8ff-08d1a8e0675d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ed15e-ee9f-7068-925e-44859559337f" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7abd-a8ff-08d1a8e0675d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7d5a-b37a-d0b1f82b405d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019ed15e-ee9f-7daf-9943-209b88807ef8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7d5a-b37a-d0b1f82b405d" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019ed15e-ee9f-7daf-9943-209b88807ef8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ed15e-ee9f-7139-8ec0-027bac3165eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7d5a-b37a-d0b1f82b405d" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ed15e-ee9f-7139-8ec0-027bac3165eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019ed15e-ee9f-723a-97a7-c46fdfec1eaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7d5a-b37a-d0b1f82b405d" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019ed15e-ee9f-723a-97a7-c46fdfec1eaf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_TaxReceivableAgreementLiabilityNoncurrent_019ed15e-ee9f-7e7e-9886-dcd6b2a5fece" xlink:href="ptlo-20260628.xsd#ptlo_TaxReceivableAgreementLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019ed15e-ee9f-7d5a-b37a-d0b1f82b405d" xlink:to="loc_ptlo_TaxReceivableAgreementLiabilityNoncurrent_019ed15e-ee9f-7e7e-9886-dcd6b2a5fece" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019ed15e-ee9f-796a-9064-97bfaa96a007" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019ed15e-ee9f-796a-9064-97bfaa96a007" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019ed15e-ee9f-7d20-92b3-0c564fbb80d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019ed15e-ee9f-7d20-92b3-0c564fbb80d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsNet_019ed15e-ee9f-7067-8382-4080c67e8cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherIntangibleAssetsNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_OtherIntangibleAssetsNet_019ed15e-ee9f-7067-8382-4080c67e8cc0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019ed15e-ee9f-72db-a60d-79942988f1ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_EquityMethodInvestments_019ed15e-ee9f-72db-a60d-79942988f1ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019ed15e-ee9f-7498-8d77-f3921e1be358" 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_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_Goodwill_019ed15e-ee9f-7498-8d77-f3921e1be358" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedTradeNames_019ed15e-ee9f-707b-a259-6db7a3cdafd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedTradeNames"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_019ed15e-ee9f-783e-b754-38f7b0bda278" xlink:to="loc_us-gaap_IndefiniteLivedTradeNames_019ed15e-ee9f-707b-a259-6db7a3cdafd5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFOPERATIONSUNAUDITED" xlink:type="simple" xlink:href="ptlo-20260628.xsd#CONDENSEDCONSOLIDATEDSTATEMENTOFOPERATIONSUNAUDITED"/>
  <link:calculationLink xlink:role="http://portillos.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFOPERATIONSUNAUDITED" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7231-8928-fa289cb952d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ed15e-ee9f-7010-814b-e1230a4fa132" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7231-8928-fa289cb952d3" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019ed15e-ee9f-7010-814b-e1230a4fa132" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7603-a6db-9ab1d96a922f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7231-8928-fa289cb952d3" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7603-a6db-9ab1d96a922f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7242-8e6d-ea4805f9830a" 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_ptlo_TaxReceivableAgreementLiabilityAdjustment_019ed15e-ee9f-7485-a669-8068b7cfe58d" xlink:href="ptlo-20260628.xsd#ptlo_TaxReceivableAgreementLiabilityAdjustment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7242-8e6d-ea4805f9830a" xlink:to="loc_ptlo_TaxReceivableAgreementLiabilityAdjustment_019ed15e-ee9f-7485-a669-8068b7cfe58d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-74cb-97f9-ffe413f983a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7242-8e6d-ea4805f9830a" xlink:to="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-74cb-97f9-ffe413f983a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019ed15e-ee9f-72a0-b133-a6fcc04afbf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7242-8e6d-ea4805f9830a" xlink:to="loc_us-gaap_InterestExpenseDebt_019ed15e-ee9f-72a0-b133-a6fcc04afbf5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_019ed15e-ee9f-795b-88ca-d9770779d158" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ed15e-ee9f-7242-8e6d-ea4805f9830a" xlink:to="loc_us-gaap_InterestIncomeOther_019ed15e-ee9f-795b-88ca-d9770779d158" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ed15e-ee9f-7f45-a75a-30356eb67fe4" 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_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7fff-a2e0-557d980eaadf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019ed15e-ee9f-7f45-a75a-30356eb67fe4" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7fff-a2e0-557d980eaadf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019ed15e-ee9f-7305-ade9-d08d60c49500" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019ed15e-ee9f-7f45-a75a-30356eb67fe4" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019ed15e-ee9f-7305-ade9-d08d60c49500" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" 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_RevenueFromContractWithCustomerExcludingAssessedTax_019ed15e-ee9f-78a5-9a0c-db05f569cac3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ed15e-ee9f-78a5-9a0c-db05f569cac3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-739b-afa5-61a631d862fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-739b-afa5-61a631d862fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_019ed15e-ee9f-786c-8d90-fd22b2afd01b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_019ed15e-ee9f-786c-8d90-fd22b2afd01b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreOpeningCosts_019ed15e-ee9f-71f6-8fc7-6b628e6ee027" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreOpeningCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_PreOpeningCosts_019ed15e-ee9f-71f6-8fc7-6b628e6ee027" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019ed15e-ee9f-70f3-9473-2b3d9d7466dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019ed15e-ee9f-70f3-9473-2b3d9d7466dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019ed15e-ee9f-7d90-aa7e-bae768320425" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019ed15e-ee9f-7d90-aa7e-bae768320425" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019ed15e-ee9f-7f7f-9c8a-b7c4d341cb4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ed15e-ee9f-7a97-9567-bb7a96c9cd42" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019ed15e-ee9f-7f7f-9c8a-b7c4d341cb4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-714b-af31-b8b9d16050b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019ed15e-ee9f-72fe-b092-449d28ba61db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-714b-af31-b8b9d16050b5" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019ed15e-ee9f-72fe-b092-449d28ba61db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectLabor_019ed15e-ee9f-7032-9677-47f62390cd4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostDirectLabor"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-714b-af31-b8b9d16050b5" xlink:to="loc_us-gaap_CostDirectLabor_019ed15e-ee9f-7032-9677-47f62390cd4b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019ed15e-ee9f-7eab-a7c2-61bcf3e75134" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OccupancyNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-714b-af31-b8b9d16050b5" xlink:to="loc_us-gaap_OccupancyNet_019ed15e-ee9f-7eab-a7c2-61bcf3e75134" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectMaterial_019ed15e-ee9f-7b04-9d61-48b4bc6b0faa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostDirectMaterial"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019ed15e-ee9f-714b-af31-b8b9d16050b5" xlink:to="loc_us-gaap_CostDirectMaterial_019ed15e-ee9f-7b04-9d61-48b4bc6b0faa" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED" xlink:type="simple" xlink:href="ptlo-20260628.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED"/>
  <link:calculationLink xlink:role="http://portillos.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ed15e-ee9f-70e1-9123-8a7ecd96c4d7" 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_PaymentsForProceedsFromOtherInvestingActivities_019ed15e-ee9f-7357-9999-b82b085fb571" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ed15e-ee9f-70e1-9123-8a7ecd96c4d7" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019ed15e-ee9f-7357-9999-b82b085fb571" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ed15e-ee9f-7905-9c98-7d0187061102" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ed15e-ee9f-70e1-9123-8a7ecd96c4d7" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ed15e-ee9f-7905-9c98-7d0187061102" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" 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_GainLossOnDispositionOfAssets1_019ed15e-ee9f-7074-9f25-e28049fc1566" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_019ed15e-ee9f-7074-9f25-e28049fc1566" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_019ed15e-ee9f-7527-aadb-6a189154f457" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_019ed15e-ee9f-7527-aadb-6a189154f457" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019ed15e-ee9f-7803-8932-63f84a4d510c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_ShareBasedCompensation_019ed15e-ee9f-7803-8932-63f84a4d510c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019ed15e-ee9f-76b8-8174-b8dcb7ca2457" 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_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019ed15e-ee9f-76b8-8174-b8dcb7ca2457" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_019ed15e-ee9f-7f64-b2ac-0fd7dc87cf27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_019ed15e-ee9f-7f64-b2ac-0fd7dc87cf27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019ed15e-ee9f-7f43-a083-22b79c2b49ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019ed15e-ee9f-7f43-a083-22b79c2b49ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019ed15e-ee9f-7cdf-ab50-975308c9b0e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019ed15e-ee9f-7cdf-ab50-975308c9b0e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7101-994d-0dca5e171d1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019ed15e-ee9f-7101-994d-0dca5e171d1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019ed15e-ee9f-7411-87eb-91a4a1c4748a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019ed15e-ee9f-7411-87eb-91a4a1c4748a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019ed15e-ee9f-7593-91f6-2ccc41e2f3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019ed15e-ee9f-7593-91f6-2ccc41e2f3bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_IncreaseDecreaseInDeferredLeaseIncentives_019ed15e-ee9f-78f7-aabd-b800844c5ce5" xlink:href="ptlo-20260628.xsd#ptlo_IncreaseDecreaseInDeferredLeaseIncentives"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_ptlo_IncreaseDecreaseInDeferredLeaseIncentives_019ed15e-ee9f-78f7-aabd-b800844c5ce5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019ed15e-ee9f-7b75-b847-8e0c6ac41cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019ed15e-ee9f-7b75-b847-8e0c6ac41cb0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ed15e-ee9f-7209-b255-3787a8997da6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ed15e-ee9f-7209-b255-3787a8997da6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019ed15e-ee9f-791c-8743-db041904df25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019ed15e-ee9f-791c-8743-db041904df25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_TaxReceivableAgreementLiabilityAdjustment_019ed15e-ee9f-7940-af25-384445ca7c6b" xlink:href="ptlo-20260628.xsd#ptlo_TaxReceivableAgreementLiabilityAdjustment"/>
    <link:calculationArc order="15" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_ptlo_TaxReceivableAgreementLiabilityAdjustment_019ed15e-ee9f-7940-af25-384445ca7c6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_GiftCardBreakage_019ed15e-ee9f-7dc2-b119-924576cbd324" xlink:href="ptlo-20260628.xsd#ptlo_GiftCardBreakage"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_ptlo_GiftCardBreakage_019ed15e-ee9f-7dc2-b119-924576cbd324" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_IncreaseDecreaseInOperatingLeaseAssets_019ed15e-ee9f-79d1-a418-79243561fb2e" xlink:href="ptlo-20260628.xsd#ptlo_IncreaseDecreaseInOperatingLeaseAssets"/>
    <link:calculationArc order="17" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_ptlo_IncreaseDecreaseInOperatingLeaseAssets_019ed15e-ee9f-79d1-a418-79243561fb2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019ed15e-ee9f-71f2-a0cf-a555a25821c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a84-b343-c06ce6442c6f" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019ed15e-ee9f-71f2-a0cf-a555a25821c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" 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_PaymentsOfFinancingCosts_019ed15e-ee9f-719d-b23f-8f67bc959ea5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_019ed15e-ee9f-719d-b23f-8f67bc959ea5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_PaymentsOfTaxReceivableAgreementLiability_019ed15e-ee9f-7ac7-9f90-6ef9768278cf" xlink:href="ptlo-20260628.xsd#ptlo_PaymentsOfTaxReceivableAgreementLiability"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_ptlo_PaymentsOfTaxReceivableAgreementLiability_019ed15e-ee9f-7ac7-9f90-6ef9768278cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_019ed15e-ee9f-7b49-abb3-ea51eb811c15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_019ed15e-ee9f-7b49-abb3-ea51eb811c15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019ed15e-ee9f-7eed-83e1-c91234c02d71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019ed15e-ee9f-7eed-83e1-c91234c02d71" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019ed15e-ee9f-74cf-81f5-ba670c88721a" 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_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019ed15e-ee9f-74cf-81f5-ba670c88721a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019ed15e-ee9f-70dc-b540-a8c6d1ed31ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019ed15e-ee9f-70dc-b540-a8c6d1ed31ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsMinorityInterest_019ed15e-ee9f-76bb-b7bb-92d02e22cb93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividendsMinorityInterest"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_PaymentsOfDividendsMinorityInterest_019ed15e-ee9f-76bb-b7bb-92d02e22cb93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019ed15e-ee9f-7664-b9c1-49c69c0433b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019ed15e-ee9f-7664-b9c1-49c69c0433b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_019ed15e-ee9f-7546-a2b2-c8a5e8a59a93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-72d6-b736-0e93e0363453" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_019ed15e-ee9f-7546-a2b2-c8a5e8a59a93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ed15e-ee9f-74eb-964b-d874402a91c8" 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_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-7cdf-bef9-8e4750973742" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ed15e-ee9f-74eb-964b-d874402a91c8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ed15e-ee9f-7cdf-bef9-8e4750973742" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ed15e-ee9f-7e4b-af54-bb4962d709ae" 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_019ed15e-ee9f-74eb-964b-d874402a91c8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ed15e-ee9f-7e4b-af54-bb4962d709ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a50-b29f-f5046a007eac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ed15e-ee9f-74eb-964b-d874402a91c8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ed15e-ee9f-7a50-b29f-f5046a007eac" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/INVENTORIESDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#INVENTORIESDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/INVENTORIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019ed15e-eea0-7816-82bd-3d70e6eac044" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_019ed15e-eea0-71fa-bbd4-e19cc198efb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ed15e-eea0-7816-82bd-3d70e6eac044" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_019ed15e-eea0-71fa-bbd4-e19cc198efb6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventoryNetOfReserves_019ed15e-eea0-7aec-ad76-ee256dbbb0b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInventoryNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ed15e-eea0-7816-82bd-3d70e6eac044" xlink:to="loc_us-gaap_OtherInventoryNetOfReserves_019ed15e-eea0-7aec-ad76-ee256dbbb0b4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_019ed15e-eea0-75cb-b753-a6f126efe653" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ed15e-eea0-7816-82bd-3d70e6eac044" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_019ed15e-eea0-75cb-b753-a6f126efe653" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_019ed15e-eea0-7a02-922e-97e7a027a76a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ed15e-eea0-7816-82bd-3d70e6eac044" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_019ed15e-eea0-7a02-922e-97e7a027a76a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/PROPERTYEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#PROPERTYEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/PROPERTYEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019ed15e-eea0-7862-8e98-7801be7e7c79" 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_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019ed15e-eea0-7a99-93d7-0586a5a605b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019ed15e-eea0-7862-8e98-7801be7e7c79" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019ed15e-eea0-7a99-93d7-0586a5a605b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019ed15e-eea0-7712-b85c-4835581b390c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019ed15e-eea0-7862-8e98-7801be7e7c79" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019ed15e-eea0-7712-b85c-4835581b390c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/GOODWILLINTANGIBLEASSETSScheduleofIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#GOODWILLINTANGIBLEASSETSScheduleofIntangibleAssetsNetDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/GOODWILLINTANGIBLEASSETSScheduleofIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-7326-86ae-5458d42928e4" 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_019ed15e-ef69-78fe-bce8-0d008a06e515" 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_019ed15e-ef69-7326-86ae-5458d42928e4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ed15e-ef69-78fe-bce8-0d008a06e515" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ed15e-ef69-7108-968f-e28cdd7ec8b0" 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_019ed15e-ef69-7326-86ae-5458d42928e4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ed15e-ef69-7108-968f-e28cdd7ec8b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-7e12-9a48-e35fc82b563f" 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_ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-704e-b998-a8ef30963090" xlink:href="ptlo-20260628.xsd#ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-7e12-9a48-e35fc82b563f" xlink:to="loc_ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-704e-b998-a8ef30963090" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ed15e-ef69-7ae4-a6fd-814efe7682f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-7e12-9a48-e35fc82b563f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ed15e-ef69-7ae4-a6fd-814efe7682f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019ed15e-ef69-7ed4-90d3-a0df8a9fd9ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-7814-8746-ea97464fdd1b" xlink:href="ptlo-20260628.xsd#ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019ed15e-ef69-7ed4-90d3-a0df8a9fd9ad" xlink:to="loc_ptlo_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill_019ed15e-ef69-7814-8746-ea97464fdd1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ed15e-ef69-73e3-94fe-a3247509337b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019ed15e-ef69-7501-a6d3-11b00096b5a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ed15e-ef69-73e3-94fe-a3247509337b" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019ed15e-ef69-7501-a6d3-11b00096b5a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-7c75-8c5c-11f2f35cd8ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ed15e-ef69-73e3-94fe-a3247509337b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-7c75-8c5c-11f2f35cd8ac" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/GOODWILLINTANGIBLEASSETSScheduleofAggregateAmortizationExpenseDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#GOODWILLINTANGIBLEASSETSScheduleofAggregateAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/GOODWILLINTANGIBLEASSETSScheduleofAggregateAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" 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_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019ed15e-ef69-75ef-bcd8-545bffac2175" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019ed15e-ef69-75ef-bcd8-545bffac2175" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019ed15e-ef69-7753-ad12-e92544680039" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019ed15e-ef69-7753-ad12-e92544680039" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019ed15e-ef69-79df-a577-73b95ba7bdfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019ed15e-ef69-79df-a577-73b95ba7bdfe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019ed15e-ef69-7f44-94d7-0bfc5bea5fa3" 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_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019ed15e-ef69-7f44-94d7-0bfc5bea5fa3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019ed15e-ef69-7125-b01b-6849c20dc38d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_019ed15e-ef69-7125-b01b-6849c20dc38d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019ed15e-ef69-7ee2-8300-860ff2f57cf0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019ed15e-ef69-7ee2-8300-860ff2f57cf0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019ed15e-ef69-76fc-81d5-a39148bac36d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ed15e-ef69-710c-ac6c-578a97914197" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019ed15e-ef69-76fc-81d5-a39148bac36d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/DEBTScheduleofDebtDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#DEBTScheduleofDebtDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/DEBTScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019ed15e-ef69-7b76-ad18-29137a0cef24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019ed15e-ef69-7600-b213-c89cbf66e373" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7b76-ad18-29137a0cef24" xlink:to="loc_us-gaap_LineOfCredit_019ed15e-ef69-7600-b213-c89cbf66e373" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019ed15e-ef69-7b17-84f1-63130493c9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7b76-ad18-29137a0cef24" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019ed15e-ef69-7b17-84f1-63130493c9b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019ed15e-ef69-7668-b9aa-1e3f5326fb23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7b76-ad18-29137a0cef24" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019ed15e-ef69-7668-b9aa-1e3f5326fb23" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/DEBTScheduleofDebtDetails_1" xlink:type="simple" xlink:href="ptlo-20260628.xsd#DEBTScheduleofDebtDetails_1"/>
  <link:calculationLink xlink:role="http://portillos.com/role/DEBTScheduleofDebtDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019ed15e-ef69-7d89-9a0e-ed6b2f4e86f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019ed15e-ef69-7ae3-a511-0b84db264472" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7d89-9a0e-ed6b2f4e86f8" xlink:to="loc_us-gaap_ShortTermBorrowings_019ed15e-ef69-7ae3-a511-0b84db264472" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019ed15e-ef69-7770-9299-f0fdee160ab5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7d89-9a0e-ed6b2f4e86f8" xlink:to="loc_us-gaap_LongTermDebtCurrent_019ed15e-ef69-7770-9299-f0fdee160ab5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019ed15e-ef69-7ab0-83c1-226738145caf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019ed15e-ef69-7d89-9a0e-ed6b2f4e86f8" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019ed15e-ef69-7ab0-83c1-226738145caf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/NONCONTROLLINGINTERESTSScheduleofLLCInterestOwnershipbyPortillosIncandPreIPOLLCMembersDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#NONCONTROLLINGINTERESTSScheduleofLLCInterestOwnershipbyPortillosIncandPreIPOLLCMembersDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/NONCONTROLLINGINTERESTSScheduleofLLCInterestOwnershipbyPortillosIncandPreIPOLLCMembersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_OwnershipPercentage_019ed15e-ef69-7e45-b26e-414f12794b14" xlink:href="ptlo-20260628.xsd#ptlo_OwnershipPercentage"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019ed15e-ef69-7a98-a09a-6d4d045f0db4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ptlo_OwnershipPercentage_019ed15e-ef69-7e45-b26e-414f12794b14" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019ed15e-ef69-7a98-a09a-6d4d045f0db4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019ed15e-ef69-720d-952c-08f5e8348d5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ptlo_OwnershipPercentage_019ed15e-ef69-7e45-b26e-414f12794b14" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019ed15e-ef69-720d-952c-08f5e8348d5c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/NONCONTROLLINGINTERESTSScheduleofEffectsChangesinOwnershipinPortillosOpCoontheCompanysEquityDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#NONCONTROLLINGINTERESTSScheduleofEffectsChangesinOwnershipinPortillosOpCoontheCompanysEquityDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/NONCONTROLLINGINTERESTSScheduleofEffectsChangesinOwnershipinPortillosOpCoontheCompanysEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ed15e-ef69-7e67-915b-2350d511012d" 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_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:to="loc_us-gaap_NetIncomeLoss_019ed15e-ef69-7e67-915b-2350d511012d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSharesIssuedForEquityBasedCompensationPlans_019ed15e-ef69-7f88-ba99-5a68efb0bff0" xlink:href="ptlo-20260628.xsd#ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSharesIssuedForEquityBasedCompensationPlans"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:to="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesSharesIssuedForEquityBasedCompensationPlans_019ed15e-ef69-7f88-ba99-5a68efb0bff0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNoncontrollingInterestAdjustment_019ed15e-ef69-76f4-a06b-9252fdd333a6" xlink:href="ptlo-20260628.xsd#ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNoncontrollingInterestAdjustment"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:to="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNoncontrollingInterestAdjustment_019ed15e-ef69-76f4-a06b-9252fdd333a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesChangesInTaxBasis_019ed15e-ef69-7e53-a033-157cafe92ae6" xlink:href="ptlo-20260628.xsd#ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesChangesInTaxBasis"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:to="loc_ptlo_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesChangesInTaxBasis_019ed15e-ef69-7e53-a033-157cafe92ae6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary_019edae4-9b78-74a6-820b-6d4578b52305" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_019ed15e-ef69-7496-8194-d55becf4ebd7" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesRepurchaseOfSharesBySubsidiary_019edae4-9b78-74a6-820b-6d4578b52305" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://portillos.com/role/EARNINGSPERSHAREScheduleofBasicandDilutedEarningsperShareDetails" xlink:type="simple" xlink:href="ptlo-20260628.xsd#EARNINGSPERSHAREScheduleofBasicandDilutedEarningsperShareDetails"/>
  <link:calculationLink xlink:role="http://portillos.com/role/EARNINGSPERSHAREScheduleofBasicandDilutedEarningsperShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ed15e-ef69-74ae-8942-6c39cccd044b" 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_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ed15e-ef69-70c1-adac-ccc0dbc2cc5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ed15e-ef69-74ae-8942-6c39cccd044b" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ed15e-ef69-70c1-adac-ccc0dbc2cc5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ed15e-ef69-7a04-8eb3-21a1a0b0357d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ed15e-ef69-74ae-8942-6c39cccd044b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ed15e-ef69-7a04-8eb3-21a1a0b0357d" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
