Mortgage Repayment

A repayment mortgage (also called a capital-and-interest mortgage) reduces the outstanding balance each month. This contrasts with an interest-only mortgage where the balance stays constant

The calculator uses the standard published formula for mortgage repayment. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Each payment = Interest accrued that month + Capital repayment. Each step in the calculation is shown so you can verify the result manually.