I wrote the amortization calculator for my own use around 1986. I re-wrote it for use on the Web in 1994, running on a webserver in the FSU Meteorology Department. This site became its new home in 2008.

The calculator doesn’t just figure out the payment: it can fill in almost any of the other parameters for you, if you know what the rest of them are. It can even handle balloon payments, negative amortizations, and extra payments under certain circumstances. (See the FAQ link below for the specifics.)

Here are some local links regarding the calculator:

If you’d like to make a request for a calculator feature, add a comment to the Feature Request page. (You’ll need to create an account.) Add a comment to the Questions page for general queries, and if you’ve think you’ve found bugs or mistakes, add a comment to the Bugs page.