diff --git a/Libraries/LibHTML/Layout/ComputedStyle.cpp b/Libraries/LibHTML/Layout/ComputedStyle.cpp
index 2716ff6463a..e5948039ae6 100644
--- a/Libraries/LibHTML/Layout/ComputedStyle.cpp
+++ b/Libraries/LibHTML/Layout/ComputedStyle.cpp
@@ -7,3 +7,13 @@ ComputedStyle::ComputedStyle()
 ComputedStyle::~ComputedStyle()
 {
 }
+
+ComputedStyle::PixelBox ComputedStyle::full_margin() const
+{
+    return {
+        m_margin.top.to_px() + m_border.top.to_px() + m_padding.top.to_px(),
+        m_margin.right.to_px() + m_border.right.to_px() + m_padding.right.to_px(),
+        m_margin.bottom.to_px() + m_border.bottom.to_px() + m_padding.bottom.to_px(),
+        m_margin.left.to_px() + m_border.left.to_px() + m_padding.left.to_px(),
+    };
+}
diff --git a/Libraries/LibHTML/Layout/ComputedStyle.h b/Libraries/LibHTML/Layout/ComputedStyle.h
index c3569005361..2fba7f6275e 100644
--- a/Libraries/LibHTML/Layout/ComputedStyle.h
+++ b/Libraries/LibHTML/Layout/ComputedStyle.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include <LibHTML/CSS/LengthBox.h>
 #include <LibDraw/Color.h>
 #include <LibDraw/Size.h>
+#include <LibHTML/CSS/LengthBox.h>
 
 enum FontStyle {
     Normal,
@@ -30,6 +30,15 @@ public:
     const Size& size() const { return m_size; }
     Size& size() { return m_size; }
 
+    struct PixelBox {
+        int top;
+        int right;
+        int bottom;
+        int left;
+    };
+
+    PixelBox full_margin() const;
+
 private:
     Color m_text_color;
     Color m_background_color;