Payment Calculator

Calculate a loan payment from term, or time to pay off from a fixed monthly payment.

Payment Calculator helps you solve for monthly payment on a fixed term, or months to pay off with a fixed payment. Enter loan amount, interest rate, loan term (years), additional months, and monthly payment, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Payment calculator does Payment Calculator is built for money decisions — loans, savings, payments, and taxes. Solve for monthly payment on a fixed term, or months to pay off with a fixed payment. You enter loan amount, interest rate, loan term (years), additional months, and monthly payment, then Simple Calculators computes the result instantly. Rates, fees, and tax rules vary by lender and country, so treat results as planning numbers, not a contract. How the math works Fixed term uses the standard amortizing PMT formula. Fixed payment simulates month-by-month until the balance clears. The formula: M = P × r × (1 + r)^n ÷ ((1 + r)^n − 1). P is the loan amount, r is the monthly rate, and n is the number of months. Fixed-payment mode instead follows the balance down month by month.