This loan calculator works out the monthly payment on a mortgage, car loan or personal loan, plus the total interest you will pay over the term. Enter the amount, the annual interest rate and the number of years.
It uses the standard amortization formula: the payment is fixed each month, with early payments mostly interest and later payments mostly principal. A longer term lowers the monthly payment but raises the total interest.
Even a small difference in interest rate changes the total a lot over 20–30 years. Compare the APR, not just the headline rate, and check for fees. This is an estimate — your lender’s exact figure may differ slightly.