Mortgage Payment Calculator

Mortgage payment calculation uses the standard loan amortisation formula. The monthly payment remains constant throughout the term (for fixed-rate mortgages), but the split between interest and capital changes — early payments are mostly interest

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