U.S. Mortgage Calculator This calculator calculates U.S. and Canadian monthly mortgage payments based on principal, interest and term. U.S. mortgages are compounded monthly while Canadian mortgages are compounded semi-annually. Amortization(Years) = Term (Years) = Yearly Interest Rate (%) = Principal Amount ($) = Downpayment (%) = Downpayment Required ($) = Mortgage Principal ($) = Monthly Payment ($) = Still Owing at End of Term ($) = Disclaimer While every effort is made to ensure that this calculator gives an accurate estimate, we do not make any warrantees, expressed or implied, regarding it's accuracy. Please contact your mortage broker to ensure an accurate quote.