diff --git a/src/ai/heuristics/height.py b/src/ai/heuristics/height.py
index 9ee8550..8f87b05 100644
--- a/src/ai/heuristics/height.py
+++ b/src/ai/heuristics/height.py
@@ -2,4 +2,13 @@ import numpy as np
 
 
 def aggregate_height(field: np.ndarray[int, np.dtype[np.uint8]]) -> int:
-    return 0
+    """
+    Calculates the aggregate height of the field.
+
+    Args:
+        field: 2D array representing the game field.
+
+    Returns:
+        The aggregate height of the field.
+    """
+    return int(np.sum(field.shape[0] - np.argmax(field, axis=0)))