diff --git a/Gems/PhysX/Code/Editor/MaterialIdWidget.cpp b/Gems/PhysX/Code/Editor/MaterialIdWidget.cpp
index 7bbdf91c20..4fba93da39 100644
--- a/Gems/PhysX/Code/Editor/MaterialIdWidget.cpp
+++ b/Gems/PhysX/Code/Editor/MaterialIdWidget.cpp
@@ -69,7 +69,7 @@ namespace PhysX
 
             auto lockToDefault = [gui]()
             {
-                gui->addItem(QLatin1String(Physics::DefaultPhysicsMaterialLabel.data(), Physics::DefaultPhysicsMaterialLabel.size()));
+                gui->addItem(QLatin1String(Physics::DefaultPhysicsMaterialLabel.data(), static_cast<int>(Physics::DefaultPhysicsMaterialLabel.size())));
                 gui->setCurrentIndex(0);
                 return false;
             };
@@ -98,7 +98,7 @@ namespace PhysX
 
             // Add default physics material first
             m_libraryIds.push_back(Physics::MaterialId());
-            gui->addItem(QLatin1String(Physics::DefaultPhysicsMaterialLabel.data(), Physics::DefaultPhysicsMaterialLabel.size()));
+            gui->addItem(QLatin1String(Physics::DefaultPhysicsMaterialLabel.data(), static_cast<int>(Physics::DefaultPhysicsMaterialLabel.size())));
 
             for (const auto& material : materials)
             {
diff --git a/Gems/PhysX/Code/Source/EditorColliderComponent.cpp b/Gems/PhysX/Code/Source/EditorColliderComponent.cpp
index 1409760742..c1056bdd73 100644
--- a/Gems/PhysX/Code/Source/EditorColliderComponent.cpp
+++ b/Gems/PhysX/Code/Source/EditorColliderComponent.cpp
@@ -780,7 +780,7 @@ namespace PhysX
                 entityRigidbody->GetRigidBody()->IsKinematic() == false)
             {
                 AZStd::string assetPath = m_shapeConfiguration.m_physicsAsset.m_configuration.m_asset.GetHint().c_str();
-                const uint lastSlash = assetPath.rfind('/');
+                const uint lastSlash = static_cast<uint>(assetPath.rfind('/'));
                 if (lastSlash != AZStd::string::npos)
                 {
                     assetPath = assetPath.substr(lastSlash + 1);
@@ -831,7 +831,7 @@ namespace PhysX
 
                 if (shapeConfiguration)
                 {
-                    m_colliderDebugDraw.BuildMeshes(*shapeConfiguration, shapeIndex);
+                    m_colliderDebugDraw.BuildMeshes(*shapeConfiguration, static_cast<AZ::u32>(shapeIndex));
                 }
             }
         }
@@ -917,7 +917,7 @@ namespace PhysX
                 const AZ::Vector3 overallScale = Utils::GetTransformScale(GetEntityId()) * m_cachedNonUniformScale * assetScale;
 
                 m_colliderDebugDraw.DrawMesh(debugDisplay, *colliderConfiguration, *cookedMeshShapeConfiguration,
-                    overallScale, shapeIndex);
+                    overallScale, static_cast<AZ::u32>(shapeIndex));
                 break;
             }
             case Physics::ShapeType::Sphere:
diff --git a/Gems/PhysX/Code/Source/Pipeline/MeshExporter.cpp b/Gems/PhysX/Code/Source/Pipeline/MeshExporter.cpp
index 068e0f68df..c882252d50 100644
--- a/Gems/PhysX/Code/Source/Pipeline/MeshExporter.cpp
+++ b/Gems/PhysX/Code/Source/Pipeline/MeshExporter.cpp
@@ -155,7 +155,7 @@ namespace PhysX
 
                 if (materialIndexIter != materialIndexByName.end())
                 {
-                    return materialIndexIter->second;
+                    return static_cast<AZ::u16>(materialIndexIter->second);
                 }
 
                 // Add it to the list otherwise
@@ -417,7 +417,7 @@ namespace PhysX
             AZ_Assert(pxCooking, "Failed to create PxCooking");
 
             physx::PxBoundedData strideData;
-            strideData.count = vertices.size();
+            strideData.count = static_cast<physx::PxU32>(vertices.size());
             strideData.stride = sizeof(Vec3);
             strideData.data = vertices.data();
 
@@ -453,7 +453,7 @@ namespace PhysX
                 physx::PxTriangleMeshDesc meshDesc;
                 meshDesc.points = strideData;
 
-                meshDesc.triangles.count = indices.size() / 3;
+                meshDesc.triangles.count = static_cast<physx::PxU32>(indices.size() / 3);
                 meshDesc.triangles.stride = sizeof(AZ::u32) * 3;
                 meshDesc.triangles.data = indices.data();
 
@@ -638,9 +638,9 @@ namespace PhysX
             {
                 decomposer->Compute(
                     vhacdVertices.data(),
-                    vhacdVertices.size() / 3,
+                    static_cast<uint32_t>(vhacdVertices.size() / 3),
                     nodeExportData.m_indices.data(),
-                    nodeExportData.m_indices.size() / 3,
+                    static_cast<uint32_t>(nodeExportData.m_indices.size() / 3),
                     vhacdParams
                 );
             }
@@ -656,9 +656,9 @@ namespace PhysX
 
                 decomposer->Compute(
                     vhacdVertices.data(),
-                    vhacdVertices.size() / 3,
+                    static_cast<uint32_t>(vhacdVertices.size() / 3),
                     vhacdIndices.data(),
-                    vhacdIndices.size() / 3,
+                    static_cast<uint32_t>(vhacdIndices.size() / 3),
                     vhacdParams
                 );
             }
@@ -841,7 +841,7 @@ namespace PhysX
                     // by the amount of vertices already added in the last iteration
                     for (const NodeCollisionGeomExportData& exportData : totalExportData)
                     {
-                        vtx_idx startingIndex = mergedVertices.size();
+                        vtx_idx startingIndex = static_cast<vtx_idx>(mergedVertices.size());
 
                         mergedVertices.insert(mergedVertices.end(), exportData.m_vertices.begin(), exportData.m_vertices.end());
 
diff --git a/Gems/PhysX/Code/Source/Pipeline/PrimitiveShapeFitter/PrimitiveShapeFitter.cpp b/Gems/PhysX/Code/Source/Pipeline/PrimitiveShapeFitter/PrimitiveShapeFitter.cpp
index 1c73a48a09..1482e9438a 100644
--- a/Gems/PhysX/Code/Source/Pipeline/PrimitiveShapeFitter/PrimitiveShapeFitter.cpp
+++ b/Gems/PhysX/Code/Source/Pipeline/PrimitiveShapeFitter/PrimitiveShapeFitter.cpp
@@ -279,7 +279,7 @@ namespace PhysX::Pipeline
         {
             if (volumeTermWeight >= 0.0 && volumeTermWeight < 1.0)
             {
-                const AZ::u32 numberOfVertices = vertices.size();
+                const AZ::u32 numberOfVertices = static_cast<AZ::u32>(vertices.size());
 
                 // Convert vertices and compute the mean of the vertex cloud.
                 AZStd::vector<Vector> verticesConverted(numberOfVertices, Vector{{ 0.0, 0.0, 0.0 }});
diff --git a/Gems/PhysX/Code/Source/Scene/PhysXScene.cpp b/Gems/PhysX/Code/Source/Scene/PhysXScene.cpp
index b6486995c0..a47f0ba16f 100644
--- a/Gems/PhysX/Code/Source/Scene/PhysXScene.cpp
+++ b/Gems/PhysX/Code/Source/Scene/PhysXScene.cpp
@@ -867,7 +867,7 @@ namespace PhysX
 
         if (newJoint != nullptr)
         {
-            AzPhysics::JointIndex index = index = m_joints.size();
+            AzPhysics::JointIndex index = static_cast<AzPhysics::JointIndex>(m_joints.size());
             m_joints.emplace_back(newJointCrc, newJoint);
 
             const AzPhysics::JointHandle newJointHandle(newJointCrc, index);
diff --git a/Gems/PhysX/Code/Source/System/PhysXSystem.cpp b/Gems/PhysX/Code/Source/System/PhysXSystem.cpp
index 353085d1c1..cc55255e24 100644
--- a/Gems/PhysX/Code/Source/System/PhysXSystem.cpp
+++ b/Gems/PhysX/Code/Source/System/PhysXSystem.cpp
@@ -219,7 +219,7 @@ namespace PhysX
 
         if (m_sceneList.size() < std::numeric_limits<AzPhysics::SceneIndex>::max()) //add a new scene if it is under the limit
         {
-            const AzPhysics::SceneHandle sceneHandle(AZ::Crc32(config.m_sceneName), (m_sceneList.size()));
+            const AzPhysics::SceneHandle sceneHandle(AZ::Crc32(config.m_sceneName), static_cast<AzPhysics::SceneIndex>(m_sceneList.size()));
             m_sceneList.emplace_back(AZStd::make_unique<PhysXScene>(config, sceneHandle));
             m_sceneAddedEvent.Signal(sceneHandle);
             return sceneHandle;