diff --git a/store/cart.py b/store/cart.py
index 63d812c..d05e7e5 100644
--- a/store/cart.py
+++ b/store/cart.py
@@ -52,7 +52,7 @@ class Cart(object):
                     variation, j['count'], j['id'])
                 self.items.append(item)
                 self.total += int(item.subtotal)
-                self.weight += variation.weight
+                self.weight += variation.weight * j['count']
         return self
 
     def serialize_items(self):