diff --git a/plakativ.py b/plakativ.py
index 4f5bfac..63e6992 100755
--- a/plakativ.py
+++ b/plakativ.py
@@ -99,7 +99,7 @@ def cm_to_mm(length):
 
 
 def in_to_mm(length):
-    return length / 25.4
+    return length * 25.4
 
 
 def pt_to_mm(length):