Loan & Mortgage Calculator — Free
Calculate monthly loan payments, total cost, and total interest from amount, rate, and term. 100% in your browser — free, no sign-up.
- ✓Free
- ✓No sign-up
- ✓Runs in your browser — files never uploaded
- ✓No watermark
How to
- 1Enter the loan amount, annual interest rate, and term in years.
- 2Read the monthly payment, total repaid, and total interest.
- 3Adjust the numbers to compare scenarios.
What does it calculate?
From a loan amount, annual interest rate, and term in years, it works out your fixed monthly payment, the total you will repay over the life of the loan, and how much of that is interest.
How it works
It uses the standard amortization formula — the same maths banks use for fixed-rate loans and mortgages — and computes everything in your browser as you type. Nothing is sent anywhere.
The formula
Monthly payment 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 payments (years × 12). Total repaid = M × n, and total interest = (M × n) − P. When the rate is 0%, payment is simply P ÷ n.
When to use it
Estimate a mortgage or car loan payment before applying, compare loan offers with different rates or terms, see how much interest a loan really costs, or check what term keeps payments affordable.
What it does not include
This is an estimate of principal and interest only. Real payments may also include property taxes, insurance, fees, or variable rates, so treat the figure as a guide and confirm with the lender.
FAQ
What does the monthly payment include?+
Principal and interest only, using the standard amortization formula. It excludes taxes, insurance, and fees.
Does it work for mortgages and car loans?+
Yes. Any fixed-rate loan works — enter the amount, annual rate, and term in years.
Can I compare different rates or terms?+
Yes. Adjust the numbers and the monthly payment, total repaid, and total interest update instantly.
Is my data sent anywhere?+
No. All calculations run in your browser.
Is it free?+
Yes, completely free — no sign-up and no watermark.
Is my data private?+
Yes — this tool runs entirely in your browser. Your files and text are never uploaded.
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