diff --git a/index.html b/index.html
index 1626299..1435817 100644
--- a/index.html
+++ b/index.html
@@ -23,6 +23,10 @@ <h1>Vector Ruler Generator
         <span>Download a laser cuttable ruler to etch into your belongings and belts.</span>
     </h1>
     <form id="rulerParameters" action="" >
+			  <label>
+								<span>Pixel per Inch (aka DPI):</span>
+								<input type="text" id="ppInch" value="96" >
+				</label>
         <label>
             <span>Start:</span>
             <input type="text"  id="startNo"  value="0"  >
diff --git a/rulerGenerator.js b/rulerGenerator.js
index 41fe337..66d8df0 100644
--- a/rulerGenerator.js
+++ b/rulerGenerator.js
@@ -31,7 +31,7 @@ var limitTickQty = function(){
 }
 
 var checkUnit = function(){
-    var pixelsPerInch = 72//I don't think this needs to be in the object....
+    var pixelsPerInch = $('#ppInch').val() 
     var pixelsPerCM  =  pixelsPerInch / ruler.cmPerInch
 
     if (ruler.units === "inches"){