diff --git a/hgext/churn.py b/hgext/churn.py
--- a/hgext/churn.py
+++ b/hgext/churn.py
@@ -205,7 +205,7 @@
                                     '*' * charnum(sum(count)))
 
     def charnum(count):
-        return int(round(count * width // maxcount))
+        return count * width // maxcount
 
     for name, count in rate:
         ui.write(format(name, count))