This JavaScript calculator will help you to decide whether or not you should refinance your current mortgage at a lower interest rate. Not only will this calculator calculate the monthly payment and net interest savings, but it will also calculate how many months it will take to break even on the closing costs.

Note: When entering numbers into the data fields only use numbers and applicable decimal points. Entering commas, dollar signs, or any other non-numeric characters will cause an error. Also please note that this calculator has been tested to work with Internet Explorer 3.01 and Netscape Navigator 3.01 web browsers. However, both must have the JavaScript option turned on.