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Loan payment and amortization calculator

Payment, total interest and the first year of the schedule, with the math in the open.

Loan payment and amortization calculator

Payment
Total paid
Total interest
First 12 payments
No.PaymentInterestPrincipalBalance

The starting numbers are placeholders so you can see the layout. They are not quotes, rates or recommendations. Replace them with your own figures.

The formula

payment = P × r ÷ (1 − (1 + r)−n), where P is the loan amount, r is the rate per payment period (annual rate ÷ payments per year) and n is the number of payments. At a 0% rate the payment is P ÷ n.

Sources and official links

Last reviewed: November 12, 2026. Runs in your browser. Nothing you type is stored or sent.