diff --git a/dashboard-ui/devices/ie/ie.js b/dashboard-ui/devices/ie/ie.js
index 5f39ead74d..a0fa18cbab 100644
--- a/dashboard-ui/devices/ie/ie.js
+++ b/dashboard-ui/devices/ie/ie.js
@@ -6,7 +6,7 @@
     function getWeek(date) {
 
         var onejan = new Date(date.getFullYear(), 0, 1);
-        return Math.ceil((((date - onejan) / 86400000) + onejan.getDay() + 1) / 7);
+        return Math.ceil((((date - onejan) / 86400000) + onejan.getDay() + 1) / 5);
     }
 
     function onPageShow() {