diff --git a/lib/utils.js b/lib/utils.js
index e28aef9..97b47ae 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -65,7 +65,16 @@ Number.prototype.fromScale = function(start, end) {
 //
 // Returns an integer representing the scaled value
 Number.prototype.toScale = function(start, end) {
-  return this * (Math.max(start, end) - Math.min(start, end)) + Math.min(start, end);
+  var i = this * (Math.max(start, end) - Math.min(start, end)) + Math.min(start, end);
+  if (i < Math.min(start, end)) {
+    return Math.min(start, end)
+  }
+  else if (i > Math.max(start,end)){
+    return Math.max(start, end)
+  }
+  else {
+    return i
+  }
 };
 
 var Utils = {