Loan Repayment Calculator

A loan repayment calculator determines monthly payments and the full repayment schedule for any type of loan — personal, car, home improvement, or business. Every payment follows the amortisation principle: interest accrues on the outstanding balance each month

The calculator uses the standard published formula for loan 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: 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.