diff --git a/docling/backend/docling_parse_backend.py b/docling/backend/docling_parse_backend.py
index 33e7792..2846981 100644
--- a/docling/backend/docling_parse_backend.py
+++ b/docling/backend/docling_parse_backend.py
@@ -60,7 +60,7 @@ class DoclingParsePageBackend(PdfPageBackend):
                 coord_origin=CoordOrigin.BOTTOMLEFT,
             ).to_top_left_origin(page_height=page_size.height * scale)
 
-            overlap_frac = cell_bbox.intersection_area_with(bbox) / cell_bbox.area()
+            overlap_frac = cell_bbox.intersection_over_self(bbox)
 
             if overlap_frac > 0.5:
                 if len(text_piece) > 0:
diff --git a/docling/backend/docling_parse_v2_backend.py b/docling/backend/docling_parse_v2_backend.py
index 6c12b66..2d83dc2 100644
--- a/docling/backend/docling_parse_v2_backend.py
+++ b/docling/backend/docling_parse_v2_backend.py
@@ -71,7 +71,7 @@ class DoclingParseV2PageBackend(PdfPageBackend):
                 coord_origin=CoordOrigin.BOTTOMLEFT,
             ).to_top_left_origin(page_height=page_size.height * scale)
 
-            overlap_frac = cell_bbox.intersection_area_with(bbox) / cell_bbox.area()
+            overlap_frac = cell_bbox.intersection_over_self(bbox)
 
             if overlap_frac > 0.5:
                 if len(text_piece) > 0:
diff --git a/docling/backend/docling_parse_v4_backend.py b/docling/backend/docling_parse_v4_backend.py
index 3e59f12..a95aceb 100644
--- a/docling/backend/docling_parse_v4_backend.py
+++ b/docling/backend/docling_parse_v4_backend.py
@@ -46,7 +46,7 @@ class DoclingParseV4PageBackend(PdfPageBackend):
                 .scaled(scale)
             )
 
-            overlap_frac = cell_bbox.intersection_area_with(bbox) / cell_bbox.area()
+            overlap_frac = cell_bbox.intersection_over_self(bbox)
 
             if overlap_frac > 0.5:
                 if len(text_piece) > 0:
diff --git a/docling/utils/layout_postprocessor.py b/docling/utils/layout_postprocessor.py
index 4c25655..27e9ea2 100644
--- a/docling/utils/layout_postprocessor.py
+++ b/docling/utils/layout_postprocessor.py
@@ -90,17 +90,12 @@ class SpatialClusterIndex:
         containment_threshold: float,
     ) -> bool:
         """Check if two bboxes overlap sufficiently."""
-        area1, area2 = bbox1.area(), bbox2.area()
-        if area1 <= 0 or area2 <= 0:
+        if bbox1.area() <= 0 or bbox2.area() <= 0:
             return False
 
-        overlap_area = bbox1.intersection_area_with(bbox2)
-        if overlap_area <= 0:
-            return False
-
-        iou = overlap_area / (area1 + area2 - overlap_area)
-        containment1 = overlap_area / area1
-        containment2 = overlap_area / area2
+        iou = bbox1.intersection_over_union(bbox2)
+        containment1 = bbox1.intersection_over_self(bbox2)
+        containment2 = bbox2.intersection_over_self(bbox1)
 
         return (
             iou > overlap_threshold
@@ -321,11 +316,9 @@ class LayoutPostprocessor:
         for special in special_clusters:
             contained = []
             for cluster in self.regular_clusters:
-                overlap = cluster.bbox.intersection_area_with(special.bbox)
-                if overlap > 0:
-                    containment = overlap / cluster.bbox.area()
-                    if containment > 0.8:
-                        contained.append(cluster)
+                containment = cluster.bbox.intersection_over_self(special.bbox)
+                if containment > 0.8:
+                    contained.append(cluster)
 
             if contained:
                 # Sort contained clusters by minimum cell ID:
@@ -379,9 +372,7 @@ class LayoutPostprocessor:
             for regular in self.regular_clusters:
                 if regular.label == DocItemLabel.TABLE:
                     # Calculate overlap
-                    overlap = regular.bbox.intersection_area_with(wrapper.bbox)
-                    wrapper_area = wrapper.bbox.area()
-                    overlap_ratio = overlap / wrapper_area
+                    overlap_ratio = wrapper.bbox.intersection_over_self(regular.bbox)
 
                     conf_diff = wrapper.confidence - regular.confidence
 
@@ -421,8 +412,7 @@ class LayoutPostprocessor:
         # Rule 2: CODE vs others
         if candidate.label == DocItemLabel.CODE:
             # Calculate how much of the other cluster is contained within the CODE cluster
-            overlap = other.bbox.intersection_area_with(candidate.bbox)
-            containment = overlap / other.bbox.area()
+            containment = other.bbox.intersection_over_self(candidate.bbox)
             if containment > 0.8:  # other is 80% contained within CODE
                 return True
 
@@ -586,11 +576,9 @@ class LayoutPostprocessor:
                 if cell.rect.to_bounding_box().area() <= 0:
                     continue
 
-                overlap = cell.rect.to_bounding_box().intersection_area_with(
+                overlap_ratio = cell.rect.to_bounding_box().intersection_over_self(
                     cluster.bbox
                 )
-                overlap_ratio = overlap / cell.rect.to_bounding_box().area()
-
                 if overlap_ratio > best_overlap:
                     best_overlap = overlap_ratio
                     best_cluster = cluster