diff --git a/src/gemdat/sites.py b/src/gemdat/sites.py
index 8f37ea94..d7a164b0 100644
--- a/src/gemdat/sites.py
+++ b/src/gemdat/sites.py
@@ -382,7 +382,9 @@ def _calculate_site_occupancy(
         label = labels[k]
         counts[label].append(v)
 
-    div = len(labels) * n_steps
-    site_occupancies = {k: sum(v) / div for k, v in counts.items()}
+    site_occupancies = {
+        k: sum(v) / (n_steps * labels.count(k))
+        for k, v in counts.items()
+    }
 
     return site_occupancies