Loan payment calculator
Monthly payment, total interest and an amortization table with extra payments.
Runs on your device — never uploaded
How to loan payment calculator
- Enter the loan
Amount, annual rate and term in years or months.
- Add extras
Optional extra monthly payment to see how much sooner it is paid off.
- Read the schedule
Month-by-month principal, interest and balance; export as CSV.
Frequently asked questions
How is the payment calculated?
The standard amortization formula: P·r(1+r)^n / ((1+r)^n − 1), with r the monthly rate and n the number of payments.
Does it handle 0% loans?
Yes, the payment is simply the amount divided by the number of months.
Is my data stored?
No, nothing leaves your browser.