Loan Calculator

Monthly payment, total interest and total cost from amount, rate and term.

Stays on your device. This tool runs in your browser — nothing you paste or open ever leaves it. Nothing uploaded, nothing to leak.

Loan amount

Interest rate

% / yr

Term

years

Result

Monthly payment

Total interest

Total repaid

An estimate on the figures you enter — not a loan offer or financial advice.

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How to use it

Enter the loan amount, the annual interest rate and the term in years. The monthly payment, total interest and total repaid update as you type.

Loan Calculator — TechWhack Score

9.5/10

Privacy 10/10

Your figures never leave the browser — nothing is uploaded or stored.
Speed 10/10

Monthly payment, total interest and total cost update as you type.
Features 8/10

Uses the proper amortized-loan formula and breaks out the monthly payment, the total interest and the total you would repay over the term.
Free 10/10

No sign-up, no limits.

Verdict: Goes beyond the monthly figure to show the total interest — the number that actually tells you what a loan costs — while making clear it is an estimate, not a quote.

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A loan calculator works out your monthly payment from three things: the amount you borrow, the annual interest rate, and the term in years. It uses the standard amortized-loan formula and also shows the total interest and the total amount you would pay over the life of the loan.

How the payment is worked out

It uses the amortized-loan (annuity) formula: each month you pay interest on the balance still owed plus a slice of the principal, so early payments are mostly interest and later ones mostly principal. The monthly figure is the fixed amount that clears the loan exactly over the term.

An estimate, not a loan offer

This shows the maths on the numbers you enter. A real loan can include fees, insurance, a different compounding method or a variable rate, so your lender’s actual payment may differ. Use it to compare options — not as a quote or as financial advice.

FAQ

How is a monthly loan payment calculated?From the amount borrowed, the monthly interest rate (annual rate ÷ 12) and the number of payments (years × 12), using the amortized-loan formula so the same payment clears the loan over the term.

How much total interest will I pay?The calculator multiplies your monthly payment by the number of months and subtracts the amount borrowed — that difference is the total interest over the life of the loan.

What is amortization?It is the way a loan is paid off in equal instalments where each payment covers the interest due plus part of the principal, so the balance falls to zero by the end of the term.

Is this a loan offer?No — it is an estimate based on the figures you type. Fees, insurance and your lender’s exact terms can change the real payment.