diff --git a/web/calculators/__init__.py b/web/calculators/__init__.py
index 6c74197..c49d8d4 100644
--- a/web/calculators/__init__.py
+++ b/web/calculators/__init__.py
@@ -214,7 +214,7 @@ class Calculator:
             self.fluctuating_survey * self.weight_survey,
         ]
 
-        fluctuating = sum(self._fluctuatings) / len(self._fluctuatings)
+        fluctuating = sum(self._fluctuatings) / sum([self.weight_ftb, self.weight_ss, self.weight_fhb, self.weight_network, self.weight_survey])
         fluctuating = self.round_method(fluctuating, self.round_bit)
 
         price = fluctuating + previous_price