Loan Calculators

All I wanted to do was to punch in my loan term, monthly payment, and rate, then see what the total of my payments would be and the total interest... I searched for at least 30 minutes trying to find a page that did that! Every other page wanted me to punch in the principle as part of the calculation, but I did not have that info at my finger tips...

Here's the page:

http://www.dinkytown.net/java/SimpleLoan.html