Financial calculator.  FREE!
Financial calculator for your web site
Future Value:
Present Value:
Interest Rate percent (per year):
Payments per year:
Payment per period:
Total # of payments 
(30 years =360, 15 years =180):
Note. The Future Value will be shown as negative if it is a balloon amount.
Leave Future Value box empty if calculating for a fully amortizing mortgage.
Also note that if you are calculating a NON-monthly loan: e.g.  bi-weekly, daily, quarterly etc. then the # of payments IS the NUMBER of payments, not number of months, years etc.
Sub-prime mortgages hard money mortgages