Loan Calculator
Monthly payment, total interest and payoff date in seconds. Free
Balance over time
Amortization schedule
About the Loan Calculator
Whisser Loan Calculator works out the monthly payment (EMI) for a mortgage, car loan, student loan or personal loan, then shows the total interest, the total you will pay and the month your loan ends. Add an extra monthly payment to see how much sooner you could be debt-free, and explore the full amortization schedule year by year or month by month. Everything is calculated in your browser.
How to use
- Pick your currency and enter the loan amount, or drag the slider.
- Set the annual interest rate and the loan term in years or months.
- Optionally add an extra monthly payment and choose the month of your first payment.
- Read your monthly payment, total interest and payoff date, then review or download the amortization schedule as CSV.
Frequently asked questions
How is the monthly payment (EMI) calculated?
The calculator uses the standard amortizing loan formula: payment = P × r ÷ (1 − (1 + r)^−n), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12) and n is the number of monthly payments. With a 0% rate, the loan amount is simply divided by the number of payments.
Why is the last payment slightly different?
Payments and interest are rounded to the smallest unit of your currency, such as cents. The final payment is adjusted by a few cents so the balance ends at exactly zero, just like a real lender's schedule.
How do extra payments help?
Any extra amount you pay each month goes straight to the principal. A lower balance means less interest every following month, so the loan is paid off sooner. The calculator shows how many months you save and how much interest you avoid.
Can I use it for a mortgage, car loan or personal loan?
Yes. It works for any fixed-rate loan repaid in equal monthly payments, including mortgages, home loans, car loans, student loans and personal loans. Property taxes, insurance and fees are not included.
Can I download the amortization schedule?
Yes. Click CSV to download every monthly payment with its principal, interest and remaining balance. The file opens in Excel, Google Sheets and Numbers.
Is my data sent anywhere?
No. All calculations run in your browser, and your last inputs are only remembered in this browser's local storage. The calculator is free and needs no account.