diff --git a/imgui.cpp b/imgui.cpp
index ace1d02761a5..40de62165b52 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -10313,7 +10313,6 @@ IM_MSVC_RUNTIME_CHECKS_RESTORE
 // - GetFrameHeight()
 // - GetFrameHeightWithSpacing()
 // - GetContentRegionMax()
-// - GetContentRegionMaxAbs() [Internal]
 // - GetContentRegionAvail(),
 // - BeginGroup()
 // - EndGroup()
@@ -10530,8 +10529,8 @@ float ImGui::CalcItemWidth()
         w = window->DC.ItemWidth;
     if (w < 0.0f)
     {
-        float region_max_x = GetContentRegionMaxAbs().x;
-        w = ImMax(1.0f, region_max_x - window->DC.CursorPos.x + w);
+        float region_avail_x = GetContentRegionAvail().x;
+        w = ImMax(1.0f, region_avail_x + w);
     }
     w = IM_TRUNC(w);
     return w;
@@ -10543,22 +10542,19 @@ float ImGui::CalcItemWidth()
 // The 4.0f here may be changed to match CalcItemWidth() and/or BeginChild() (right now we have a mismatch which is harmless but undesirable)
 ImVec2 ImGui::CalcItemSize(ImVec2 size, float default_w, float default_h)
 {
-    ImGuiContext& g = *GImGui;
-    ImGuiWindow* window = g.CurrentWindow;
-
-    ImVec2 region_max;
+    ImVec2 avail;
     if (size.x < 0.0f || size.y < 0.0f)
-        region_max = GetContentRegionMaxAbs();
+        avail = GetContentRegionAvail();
 
     if (size.x == 0.0f)
         size.x = default_w;
     else if (size.x < 0.0f)
-        size.x = ImMax(4.0f, region_max.x - window->DC.CursorPos.x + size.x);
+        size.x = ImMax(4.0f, avail.x + size.x); // <-- size.x is negative here so we are subtracting
 
     if (size.y == 0.0f)
         size.y = default_h;
     else if (size.y < 0.0f)
-        size.y = ImMax(4.0f, region_max.y - window->DC.CursorPos.y + size.y);
+        size.y = ImMax(4.0f, avail.y + size.y); // <-- size.y is negative here so we are subtracting
 
     return size;
 }
@@ -10587,30 +10583,22 @@ float ImGui::GetFrameHeightWithSpacing()
     return g.FontSize + g.Style.FramePadding.y * 2.0f + g.Style.ItemSpacing.y;
 }
 
-// FIXME: All the Contents Region function are messy or misleading. WE WILL AIM TO OBSOLETE ALL OF THEM WITH A NEW "WORK RECT" API. Thanks for your patience!
-
-// FIXME: This is in window space (not screen space!).
-ImVec2 ImGui::GetContentRegionMax()
+ImVec2 ImGui::GetContentRegionAvail()
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
     ImVec2 mx = (window->DC.CurrentColumns || g.CurrentTable) ? window->WorkRect.Max : window->ContentRegionRect.Max;
-    return mx - window->Pos;
+    return mx - window->DC.CursorPos;
 }
 
-// [Internal] Absolute coordinate. Saner. This is not exposed until we finishing refactoring work rect features.
-ImVec2 ImGui::GetContentRegionMaxAbs()
+// FIXME: All the Contents Region function are messy or misleading. WE WILL AIM TO OBSOLETE ALL OF THEM WITH A NEW "WORK RECT" API. Thanks for your patience!
+// FIXME: This is in window space (not screen space!).
+ImVec2 ImGui::GetContentRegionMax()
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
     ImVec2 mx = (window->DC.CurrentColumns || g.CurrentTable) ? window->WorkRect.Max : window->ContentRegionRect.Max;
-    return mx;
-}
-
-ImVec2 ImGui::GetContentRegionAvail()
-{
-    ImGuiWindow* window = GImGui->CurrentWindow;
-    return GetContentRegionMaxAbs() - window->DC.CursorPos;
+    return mx - window->Pos;
 }
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
diff --git a/imgui_internal.h b/imgui_internal.h
index 6fa1ee799e00..6cee078571d1 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -3217,7 +3217,6 @@ namespace ImGui
     IMGUI_API ImVec2        CalcItemSize(ImVec2 size, float default_w, float default_h);
     IMGUI_API float         CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x);
     IMGUI_API void          PushMultiItemsWidths(int components, float width_full);
-    IMGUI_API ImVec2        GetContentRegionMaxAbs();
     IMGUI_API void          ShrinkWidths(ImGuiShrinkWidthItem* items, int count, float width_excess);
 
     // Parameter stacks (shared)