Hey there!
I am from Chicago, IL. USA. My time zone is central and I know I can complete your web tool quickly.
I plan on using Javascript for multiple reasons. This is simply a calculator so no need to connect to another server (PHP), less code (more efficient) and it will look great!
Let me know if you have any questions! I respond to messages quickly as I am always connected!
Example(I dont currently have access to your formulas so I made up one :) ):
<script>
var inputLength; //prep variables
var inputHeight;
var output;
output = inputLength * inputHeight; //do math
[login to view URL]("displayCompletedCalculation").innerHTML = output; //show calculation
[login to view URL]("textBoxLength").value = ""; //clear input
[login to view URL]("textBoxHeight").value = "";
</script>