diff --git a/src/utils/eventLevels.js b/src/utils/eventLevels.js
index 73312a0d5..3deac4858 100644
--- a/src/utils/eventLevels.js
+++ b/src/utils/eventLevels.js
@@ -8,9 +8,9 @@ export function eventSegments(event, first, last, { startAccessor, endAccessor,
 
   let span = dates.diff(start, end, 'day');
 
-  span = Math.max(Math.min(span, slots), 1);
+  span = Math.floor(Math.max(Math.min(span, slots), 1));
 
-  let padding = dates.diff(first, start, 'day');
+  let padding = Math.floor(dates.diff(first, start, 'day'));
 
   return {
     event,