diff --git a/Userland/Libraries/LibWeb/CSS/CalculatedOr.cpp b/Userland/Libraries/LibWeb/CSS/CalculatedOr.cpp
index 0b73f10888..cab98ec8eb 100644
--- a/Userland/Libraries/LibWeb/CSS/CalculatedOr.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CalculatedOr.cpp
@@ -13,11 +13,21 @@ Angle AngleOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue>
     return calculated->resolve_angle().value();
 }
 
+Flex FlexOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const&) const
+{
+    return calculated->resolve_flex().value();
+}
+
 Frequency FrequencyOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const&) const
 {
     return calculated->resolve_frequency().value();
 }
 
+i64 IntegerOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const&) const
+{
+    return calculated->resolve_integer().value();
+}
+
 Length LengthOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const& layout_node) const
 {
     return calculated->resolve_length(layout_node).value();
@@ -30,6 +40,11 @@ Length LengthOrCalculated::resolved(Length::ResolutionContext const& context) co
     return value();
 }
 
+double NumberOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const&) const
+{
+    return calculated->resolve_number().value();
+}
+
 Percentage PercentageOrCalculated::resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const& calculated, Layout::Node const&) const
 {
     return calculated->resolve_percentage().value();
diff --git a/Userland/Libraries/LibWeb/CSS/CalculatedOr.h b/Userland/Libraries/LibWeb/CSS/CalculatedOr.h
index 59e89c999e..1d946cfc47 100644
--- a/Userland/Libraries/LibWeb/CSS/CalculatedOr.h
+++ b/Userland/Libraries/LibWeb/CSS/CalculatedOr.h
@@ -8,6 +8,7 @@
 
 #include <AK/Variant.h>
 #include <LibWeb/CSS/Angle.h>
+#include <LibWeb/CSS/Flex.h>
 #include <LibWeb/CSS/Frequency.h>
 #include <LibWeb/CSS/Length.h>
 #include <LibWeb/CSS/Percentage.h>
@@ -84,6 +85,13 @@ public:
     Angle resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const&, Layout::Node const&) const override;
 };
 
+class FlexOrCalculated : public CalculatedOr<Flex> {
+public:
+    using CalculatedOr<Flex>::CalculatedOr;
+
+    Flex resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const&, Layout::Node const&) const override;
+};
+
 class FrequencyOrCalculated : public CalculatedOr<Frequency> {
 public:
     using CalculatedOr<Frequency>::CalculatedOr;
@@ -91,6 +99,13 @@ public:
     Frequency resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const&, Layout::Node const&) const override;
 };
 
+class IntegerOrCalculated : public CalculatedOr<i64> {
+public:
+    using CalculatedOr<i64>::CalculatedOr;
+
+    i64 resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const&, Layout::Node const&) const override;
+};
+
 class LengthOrCalculated : public CalculatedOr<Length> {
 public:
     using CalculatedOr<Length>::CalculatedOr;
@@ -99,6 +114,13 @@ public:
     [[nodiscard]] Length resolved(Length::ResolutionContext const&) const;
 };
 
+class NumberOrCalculated : public CalculatedOr<double> {
+public:
+    using CalculatedOr<double>::CalculatedOr;
+
+    double resolve_calculated(NonnullRefPtr<CalculatedStyleValue> const&, Layout::Node const&) const override;
+};
+
 class PercentageOrCalculated : public CalculatedOr<Percentage> {
 public:
     using CalculatedOr<Percentage>::CalculatedOr;
diff --git a/Userland/Libraries/LibWeb/Forward.h b/Userland/Libraries/LibWeb/Forward.h
index 4fa70adcb6..8ee6c751cb 100644
--- a/Userland/Libraries/LibWeb/Forward.h
+++ b/Userland/Libraries/LibWeb/Forward.h
@@ -119,6 +119,7 @@ class ElementInlineCSSStyleDeclaration;
 class ExplicitGridTrack;
 class FilterValueListStyleValue;
 class Flex;
+class FlexOrCalculated;
 class FlexStyleValue;
 class FontFace;
 class Frequency;
@@ -138,6 +139,7 @@ class IdentifierStyleValue;
 class ImageStyleValue;
 class InheritStyleValue;
 class InitialStyleValue;
+class IntegerOrCalculated;
 class IntegerStyleValue;
 class Length;
 class LengthBox;
@@ -152,6 +154,7 @@ class MediaQuery;
 class MediaQueryList;
 class MediaQueryListEvent;
 class Number;
+class NumberOrCalculated;
 class NumberStyleValue;
 class Percentage;
 class PercentageOrCalculated;