diff --git a/dist/image-editor.js b/dist/image-editor.js
index 98e9430..46d4feb 100644
--- a/dist/image-editor.js
+++ b/dist/image-editor.js
@@ -1482,12 +1482,19 @@ function RulerHandler(viewport) {
         var bounds = viewport.getBounds();
         var pos = util.assertBetween(ruler[axis], bounds.min[axis], bounds.max[axis]);
         ruler.marker[axis] = ruler[axis] = pos;
-        var dim = (ruler[axis] - bounds[axis]) / (viewport.getData().ppmm * 10 * viewport.canvas.getImage().scaleX);
+        var posWithinBounds = ruler[axis] - bounds[axis];
+        var viewportData = viewport.getData();
+        var imageData = viewport.canvas.getImage();
+        var pixelsPerCm = viewportData.ppmm * 10 * imageData.scaleX;
+        var dim = posWithinBounds / pixelsPerCm;
+        var units = viewportData.dim.units;
 
+        if (units === 'inch') {
+            dim /= 2.54;
+        }
         if (axis === 'top') {
-            dim = viewport.getData().dim.height - dim;
+            dim = viewportData.dim.height - dim;
         }
-        var units = viewport.getData().dim.units;
         var value = Math.round(dim * 100) / 100;
         if(units === 'cm') {
             value = Math.round(value);
diff --git a/src/RulerHandler.js b/src/RulerHandler.js
index 31183dc..9a797ec 100644
--- a/src/RulerHandler.js
+++ b/src/RulerHandler.js
@@ -15,12 +15,19 @@ function RulerHandler(viewport) {
         var bounds = viewport.getBounds();
         var pos = util.assertBetween(ruler[axis], bounds.min[axis], bounds.max[axis]);
         ruler.marker[axis] = ruler[axis] = pos;
-        var dim = (ruler[axis] - bounds[axis]) / (viewport.getData().ppmm * 10 * viewport.canvas.getImage().scaleX);
+        var posWithinBounds = ruler[axis] - bounds[axis];
+        var viewportData = viewport.getData();
+        var imageData = viewport.canvas.getImage();
+        var pixelsPerCm = viewportData.ppmm * 10 * imageData.scaleX;
+        var dim = posWithinBounds / pixelsPerCm;
+        var units = viewportData.dim.units;
 
+        if (units === 'inch') {
+            dim /= 2.54;
+        }
         if (axis === 'top') {
-            dim = viewport.getData().dim.height - dim;
+            dim = viewportData.dim.height - dim;
         }
-        var units = viewport.getData().dim.units;
         var value = Math.round(dim * 100) / 100;
         if(units === 'cm') {
             value = Math.round(value);