Loan Calculator
Estimate monthly loan payments, total interest, and total cost.
Your files never leave your device. No upload. No sign-up.
About the Loan Calculator
Work out exactly what a loan will cost you before you sign. Enter the amount, annual interest rate, and term in years to instantly see your monthly payment, the total interest you'll pay, and the total amount repaid over the life of the loan. Everything runs in your browser — your numbers never leave your device.
How to use the Loan Calculator
- 1Enter the loan amount you want to borrow.
- 2Type the annual interest rate (APR) as a percentage.
- 3Set the loan term in years.
- 4Read your monthly payment, total interest, and total repayment instantly.
Why use our Loan Calculator
Accurate amortization
Uses the standard amortization formula banks and lenders use.
Handles 0% loans
Interest-free loans are calculated correctly as a simple split of the principal.
Instant updates
Results recalculate as you type — no buttons to click.
100% private
Your financial details stay on your device. Nothing is uploaded or stored.
Frequently asked questions
How is the monthly payment calculated?+
We use the standard amortization formula M = P·r·(1+r)^n / ((1+r)^n − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the number of monthly payments (years × 12).
Does this include taxes, insurance, or fees?+
No. This calculator estimates the principal-and-interest payment only. For a mortgage with taxes and insurance, use our Mortgage Calculator and add those line items separately.
Why is my total interest so high?+
Long loan terms and high interest rates dramatically increase the total interest paid. Try shortening the term or making extra principal payments to see the difference.
Is my information saved anywhere?+
No. Calculations run entirely in your browser. Nothing is sent to a server or logged.