diff --git a/src/ol/geom/flat/lengthflatgeom.js b/src/ol/geom/flat/lengthflatgeom.js
new file mode 100644
index 0000000000..52d053c4d8
--- /dev/null
+++ b/src/ol/geom/flat/lengthflatgeom.js
@@ -0,0 +1,45 @@
+goog.provide('ol.geom.flat.length');
+
+goog.require('ol.geom.flat');
+
+
+/**
+ * @param {Array.<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {number} end End.
+ * @param {number} stride Stride.
+ * @return {number} Length.
+ */
+ol.geom.flat.length.lineString =
+    function(flatCoordinates, offset, end, stride) {
+  var x1 = flatCoordinates[offset];
+  var y1 = flatCoordinates[offset + 1];
+  var length = 0;
+  var i;
+  for (i = offset + stride; i < end; i += stride) {
+    var x2 = flatCoordinates[i];
+    var y2 = flatCoordinates[i + 1];
+    length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
+    x1 = x2;
+    y1 = y2;
+  }
+  return length;
+};
+
+
+/**
+ * @param {Array.<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {number} end End.
+ * @param {number} stride Stride.
+ * @return {number} Perimeter.
+ */
+ol.geom.flat.length.linearRing =
+    function(flatCoordinates, offset, end, stride) {
+  var perimeter =
+      ol.geom.flat.length.lineString(flatCoordinates, offset, end, stride);
+  var dx = flatCoordinates[end - stride] - flatCoordinates[offset];
+  var dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];
+  perimeter += Math.sqrt(dx * dx + dy * dy);
+  return perimeter;
+};
diff --git a/src/ol/geom/flatgeom.js b/src/ol/geom/flatgeom.js
index 3acca91c64..42df2388b7 100644
--- a/src/ol/geom/flatgeom.js
+++ b/src/ol/geom/flatgeom.js
@@ -198,29 +198,6 @@ ol.geom.flat.inflateCoordinatesss =
 };
 
 
-/**
- * @param {Array.<number>} flatCoordinates Flat coordinates.
- * @param {number} offset Offset.
- * @param {number} end End.
- * @param {number} stride Stride.
- * @return {number} Length.
- */
-ol.geom.flat.lineStringLength = function(flatCoordinates, offset, end, stride) {
-  var x1 = flatCoordinates[offset];
-  var y1 = flatCoordinates[offset + 1];
-  var length = 0;
-  var i;
-  for (i = offset + stride; i < end; i += stride) {
-    var x2 = flatCoordinates[i];
-    var y2 = flatCoordinates[i + 1];
-    length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
-    x1 = x2;
-    y1 = y2;
-  }
-  return length;
-};
-
-
 /**
  * @param {Array.<number>} flatCoordinates Flat coordinates.
  * @param {number} offset Offset.
@@ -298,24 +275,6 @@ ol.geom.flat.linearRingIsClockwise =
 };
 
 
-/**
- * @param {Array.<number>} flatCoordinates Flat coordinates.
- * @param {number} offset Offset.
- * @param {number} end End.
- * @param {number} stride Stride.
- * @return {number} Perimeter.
- */
-ol.geom.flat.linearRingPerimeter =
-    function(flatCoordinates, offset, end, stride) {
-  var perimeter =
-      ol.geom.flat.lineStringLength(flatCoordinates, offset, end, stride);
-  var dx = flatCoordinates[end - stride] - flatCoordinates[offset];
-  var dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];
-  perimeter += Math.sqrt(dx * dx + dy * dy);
-  return perimeter;
-};
-
-
 /**
  * @param {Array.<number>} flatCoordinates Flat coordinates.
  * @param {number} offset Offset.
diff --git a/src/ol/geom/linestring.js b/src/ol/geom/linestring.js
index 71197f755c..91e621a6b2 100644
--- a/src/ol/geom/linestring.js
+++ b/src/ol/geom/linestring.js
@@ -8,6 +8,7 @@ goog.require('ol.geom.SimpleGeometry');
 goog.require('ol.geom.flat');
 goog.require('ol.geom.flat.closest');
 goog.require('ol.geom.flat.interpolate');
+goog.require('ol.geom.flat.length');
 goog.require('ol.geom.flat.simplify');
 
 
@@ -136,7 +137,7 @@ ol.geom.LineString.prototype.getCoordinates = function() {
  * @todo stability experimental
  */
 ol.geom.LineString.prototype.getLength = function() {
-  return ol.geom.flat.lineStringLength(
+  return ol.geom.flat.length.lineString(
       this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
 };