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Loan Calculator

Find your monthly payment and total interest on any fixed-rate loan — and see how extra payments get you debt-free faster.

  • No upload
  • Free
  • No signup
$
%
$
Monthly payment
$0
—
  • Total principal$0
  • Total interest$0
  • Total cost$0
  • Payoff time—

Runs entirely in your browser — nothing is uploaded.

Generated entirely in your browser.

How to use Loan Calculator

  1. Enter the loan amount you're borrowing.
  2. Type the interest rate (APR) and the term in years.
  3. Optionally add an extra monthly payment to see how much faster you'd pay it off and how much interest you'd save.
  4. Read your monthly payment at the top and the total interest, total cost and payoff time in the breakdown.

Common use cases

  • Car shopping. Work out the monthly payment on an auto loan before you sit down with the dealer's finance desk, so you know a fair number.
  • Personal loan comparison. Compare offers from different lenders by seeing which one costs the least in total interest, not just the lowest monthly payment.
  • Student loan planning. See what your student loan payment will be after graduation and how adding a little extra each month shortens the payoff.
  • Debt payoff strategy. Test how an extra $50 or $100 a month changes your payoff date and total interest — often the fastest way to save money.

Tips

  • The lowest monthly payment usually means the most total interest. Always compare total cost, not just the monthly figure.
  • Even a small extra monthly payment goes straight to principal and can cut months or years off the loan.
  • APR includes some fees, so it's a better comparison number than the plain interest rate.
  • Shorter terms mean higher payments but far less interest overall.

Troubleshooting

The payoff says 'payment too low'.
Your monthly payment (base plus extra) doesn't even cover the monthly interest, so the balance never shrinks. This only happens if you manually lower the base — normally the calculated payment always covers interest.
My total interest seems high.
Longer terms and higher rates pile on interest fast. Try a shorter term or add an extra monthly payment to see the difference.

Frequently asked questions

What kinds of loans does this work for?
Any fixed-rate installment loan — personal, auto, student, home improvement. It uses standard amortization, the same math lenders use.
How does the extra payment field work?
Anything you add there is applied to principal every month, which shortens the loan and lowers total interest. The tool re-amortizes to show your real payoff time.
What's the difference between interest rate and APR?
APR includes certain lender fees on top of the interest rate, so it reflects the true yearly cost. Use the APR your lender quotes for the most accurate result.
Does this account for fees or insurance?
No — it calculates principal and interest only. Origination fees or add-on insurance would be on top of the figures shown.
Is my information private?
Completely. Everything is calculated in your browser and nothing is uploaded.