Loan Payment Calculator
Punch in a fixed-rate loan and you'll see the monthly payment, the total interest, the payoff date, and a full amortization schedule you can export as CSV. Add an extra monthly or one-off payment to watch how much interest and time it shaves off. Zero-interest loans are handled properly, and it's all for estimates rather than financial advice.
- 100% free
- Private & safe
- Runs in your browser
Why use Loan Calculator?
Loan Calculator gives you accurate results instantly, with the underlying formula shown so you can trust the numbers.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles M = P × [r(1 + r)^n] / [(1 + r)^n − 1]; Zero interest: monthly payment = principal ÷ number of payments.
- Enter the loan amount, annual interest rate and term (in years or months).
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use Loan Calculator
- Enter the loan amount, annual interest rate and term (in years or months).
- Optionally add extra monthly payments, a one-time payment, fees and a start date.
- See the monthly payment, totals, payoff date and interest-to-principal split instantly.
- Expand the amortization schedule, download it as CSV, or share a link with your inputs.
Examples
- A $25,000 loan at 6.5% over 5 years → about $489/month.
- Adding $100 extra per month to see interest and months saved.
Formulas
- M = P × [r(1 + r)^n] / [(1 + r)^n − 1]
- Zero interest: monthly payment = principal ÷ number of payments
Limitations
- Estimates only — actual lender payments, fees, compounding and rounding may differ.
- Currency selection changes formatting only; no currency conversion is performed.
- This is not financial advice or a loan offer.
Frequently asked questions
How is the monthly payment calculated?
It uses the standard fixed-rate amortization formula, or principal ÷ number of payments when the interest rate is zero.
Do extra payments really save money?
Extra payments reduce the balance faster, which lowers total interest and shortens the term. The tool shows the estimated savings, but your lender's terms apply.
Are my numbers sent anywhere?
No. All calculations run in your browser and your loan values are never uploaded or logged.