Loan Amortization Calculator
See your loan payment, total interest, and an amortization schedule.
Estimates only. Excludes origination fees, insurance, and rate changes. Not financial advice — confirm figures with your lender.
About Loan Amortization Calculator
Loan Amortization Calculator works out your monthly payment, the total interest you will pay over the life of a fixed-rate loan, and a complete amortization schedule showing how each payment splits between principal and interest. It is the right tool for car loans, personal loans, student loans, and any other fixed-rate installment loan.
Worked example: borrow $20,000 at 7% APR for 5 years. The calculator returns a monthly payment of about $396, total payments of roughly $23,760, and around $3,760 in interest. The schedule shows that in month 1 about $117 of your $396 goes to interest and $279 to principal — and that ratio flips by the end of the loan, when nearly every dollar of the payment is principal. Change the rate or term and the whole picture updates instantly.
The math uses the standard fixed-rate amortization formula: M = P · r(1+r)^n / ((1+r)^n − 1), where P is the principal, r is the monthly rate (APR / 12), and n is the number of months. That is the same formula a bank uses for a conventional fixed-rate loan. What it does not model: origination fees, prepayment penalties, late fees, variable-rate adjustments, or any lender-specific charges. Use the output as a planning estimate, and confirm the real numbers with your lender before signing anything.
All calculations run locally in your browser. Your income, debts, and loan plans are never uploaded or logged.