diff --git a/src/ol/rectangle.js b/src/ol/rectangle.js
index 5c51090971..c1b961d1b7 100644
--- a/src/ol/rectangle.js
+++ b/src/ol/rectangle.js
@@ -103,3 +103,14 @@ ol.Rectangle.prototype.getSize = function() {
 ol.Rectangle.prototype.getWidth = function() {
   return this.maxX - this.minX;
 };
+
+
+/**
+ * @param {goog.math.Coordinate} coordinate Coordinate.
+ * @return {goog.math.Coordinate} Coordinate.
+ */
+ol.Rectangle.prototype.normalize = function(coordinate) {
+  return new goog.math.Coordinate(
+      (coordinate.x - this.minX) / this.getWidth(),
+      (coordinate.y - this.minY) / this.getHeight());
+};
diff --git a/src/ol/rectangle_test.js b/src/ol/rectangle_test.js
index 3a8c7d4475..56986c68f3 100644
--- a/src/ol/rectangle_test.js
+++ b/src/ol/rectangle_test.js
@@ -107,3 +107,30 @@ function testSize() {
   assertEquals(2, size.width);
   assertEquals(3, size.height);
 }
+
+
+function testNormalize() {
+  var rectangle = new ol.Rectangle(0, 1, 2, 3);
+  var coordinate;
+
+  coordinate = rectangle.normalize(new goog.math.Coordinate(1, 2));
+  assertEquals(0.5, coordinate.x);
+  assertEquals(0.5, coordinate.y);
+
+  coordinate = rectangle.normalize(new goog.math.Coordinate(0, 3));
+  assertEquals(0, coordinate.x);
+  assertEquals(1, coordinate.y);
+
+  coordinate = rectangle.normalize(new goog.math.Coordinate(2, 1));
+  assertEquals(1, coordinate.x);
+  assertEquals(0, coordinate.y);
+
+  coordinate = rectangle.normalize(new goog.math.Coordinate(0, 0));
+  assertEquals(0, coordinate.x);
+  assertEquals(-0.5, coordinate.y);
+
+  coordinate = rectangle.normalize(new goog.math.Coordinate(-1, 1));
+  assertEquals(-0.5, coordinate.x);
+  assertEquals(0, coordinate.y);
+
+}