When thinking about buying a house, it is helpful to know what your estimated total payment will be. This Mortgage Calculator will allow you enter your desired loan amount, years for a fixed rate mortgage (15, 20, 30), approximate interest rate. Please fill in all fields and click “Calculate” to get your estimated monthly payments for Principal & Interest. Note: these are estimates only. Jaret & Cohn or your local area banker/mortgage broker can provide you with a more accurate payment amount.