diff --git a/main.py b/main.py
index bb10576..3148d9f 100644
--- a/main.py
+++ b/main.py
@@ -89,7 +89,7 @@ def format_data(data):
         "Qdilute": np.round(data.get("FM1", 0.0), 1),
         "Qdrain": np.round(data.get("FM4", 0.0), 1),
         "Qrecirc": np.round(data.get("FM3", 0.0), 1),
-        "QdrainEDI": np.round(data.get("FM1", 0.0), 1)- np.round(data.get("FM2", 0.0), 1),
+        "QdrainEDI": np.round(data.get("FM2", 0.0), 1)- np.round(data.get("FM1", 0.0), 1),
         "Pro": np.round(data.get("PS2", 0.0), 1),
         "Pdilute": np.round(data.get("PS3", 0.0), 1),
         "Pretentate": np.round(data.get("PS1", 0.0), 1),