How to Use This Calculator

Enter the loan amount you're considering, the APR (annual percentage rate) a lender has quoted you or that you expect to qualify for, and the repayment term in months. The calculator updates instantly as you type — there's no submit button and nothing is sent anywhere.

Use this tool before you apply to compare offers on equal footing. Two loans with the same monthly payment can have very different total costs depending on term length, and two loans with the same APR can have different monthly payments depending on how the lender structures fees.

What the Inputs Mean

  • Loan Amount: The amount you're borrowing, before any origination fees a lender might deduct.
  • APR: Annual percentage rate — the yearly cost of the loan including interest, expressed as a percentage. This is different from a lender's "interest rate," which can exclude fees.
  • Term: The number of months you have to repay the loan. Longer terms lower your monthly payment but increase total interest paid.

Assumptions & Formula

  • This calculator assumes a standard fixed-rate, fully amortizing loan — the same calculation method used for most personal loans, meaning your payment is the same every month and is split between principal and interest according to a standard amortization schedule.
  • It does not account for origination fees, which some lenders deduct from your disbursed amount or add to your APR. Always compare the APR, not just the stated interest rate, since APR is required by law to include most fees.
  • Results are estimates for planning purposes only and are not a loan offer or a guarantee of approval or rate.

Formula: Monthly payment = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1], where P is the loan amount, r is the monthly interest rate (APR ÷ 12 ÷ 100), and n is the number of monthly payments — the standard fixed-rate amortization formula used throughout consumer lending.

Worked Example

Say you're borrowing $15,000 at 11.5% APR over 48 months. Plugging those numbers in: the monthly rate is 11.5% ÷ 12 ≈ 0.958%. The amortization formula returns a monthly payment of about $392. Over 48 months that's roughly $18,816 total, meaning about $3,816 of the total is interest. Shortening the term to 36 months raises the monthly payment to around $495 but cuts total interest to about $2,820 — a direct trade-off between monthly affordability and total cost that this calculator lets you test instantly.

Frequently Asked Questions

Does this calculator check my credit or affect my credit score?

No. This tool performs a plain math calculation in your browser — it doesn't connect to any credit bureau, doesn't perform a soft or hard credit pull, and doesn't share your inputs with anyone.

Why is my actual quoted payment different from this estimate?

Lenders may charge an origination fee that's deducted from your loan proceeds or folded into your effective APR, and some round payments or compounding slightly differently. Use your lender's official APR (not just the interest rate) for the closest match.

What's a good APR for a personal loan?

It depends heavily on your credit profile, but personal loan APRs typically range from roughly 7% for excellent credit to 30%+ for subprime borrowers. Comparing multiple pre-qualified offers is the most reliable way to know what you actually qualify for.

Should I choose a longer or shorter term?

A shorter term means a higher monthly payment but substantially less total interest paid. A longer term lowers your monthly payment but costs more overall. Use the calculator to compare a few term lengths against your monthly budget.

Sources

  • Methodology note — Default values shown are illustrative starting points, not live market rates. This tool does not currently pull personal loan rates from a live data feed.