Mortgage Calculator

A mortgage calculator computes monthly repayments for a home loan based on the loan amount, interest rate, and term. In a repayment mortgage, each payment covers interest plus a portion of the capital, so the balance decreases over time and reaches zero at the end of the term

The calculator uses the standard published formula for mortgage. 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: Monthly payment M = P × r(1+r)^n / ((1+r)^n − 1). Each step in the calculation is shown so you can verify the result manually.