Find the true Annual Percentage Rate including both interest rate and upfront fees. Compare loan offers on equal footing.
An APR calculator shows the true cost of a loan by including both the interest rate and any upfront fees (origination, points, closing costs) as a single annualized rate. Lenders are required to disclose APR under the Truth in Lending Act (TILA) so you can compare loan offers fairly. Our APR calculator uses bisection search to find the rate that equates the present value of all monthly payments to the loan amount minus fees, giving you the actual borrowing cost in a single percentage.
Common: 1-5% of loan amount
6.50%
7.780%
$195.66
$2,039.69
APR is the Annual Percentage Rate, which includes both the note rate and any fees folded into the loan. The lender is required to disclose APR under the Truth in Lending Act (TILA) so you can compare loan offers fairly. Lower APR = lower true cost of borrowing.
Monthly payment on a $10,000 3-year personal loan at common APRs (which includes fees + interest rate):
| APR | Monthly payment | Total interest | Total paid |
|---|---|---|---|
| 8% | $313 | $1,272 | $11,272 |
| 12% | $332 | $1,950 | $11,950 |
| 18% | $361 | $2,997 | $12,997 |
| 24% | $391 | $4,074 | $14,074 |
APR includes fees + interest rate, making it a better comparison tool than interest rate alone. Credit card APRs range 18-29% in 2026. Use the calculator above with your specific loan terms.
Cross-checked against authoritative formulas (IRS, NIST, ACSM) and updated for 2025/2026 tax years and rates.
No server roundtrip. All math runs in your browser so results appear the moment you finish typing.
We never collect, store, or transmit your inputs. Every calculation runs locally in your browser.
Each calculator includes the formula, plain-English explanation, and FAQs so you understand the result.
Estimates only. Calculator results are for educational and planning purposes — not professional advice. For binding decisions on taxes, investments, health, or legal matters, consult a qualified professional.
FAQ
Everything you need to know about this calculator. Can't find what you're looking for? Email our team.
An APR (Annual Percentage Rate) calculator is a free loan-cost comparison tool that shows the true cost of borrowing including both the interest rate and any fees. Our APR calculator accepts loan amount, note rate (advertised interest), term, and upfront fees, then uses bisection search to find the APR — the rate at which the present value of all monthly payments equals the loan amount minus fees. APR is required to be disclosed by lenders under the Truth in Lending Act (TILA).
How it works
Our APR calculator finds the true cost-of-borrowing rate by including both the note rate and any upfront fees, using bisection search to solve the loan equation.
Type the loan principal and term in years. The APR calculator computes the monthly payment from the note rate using the standard amortization formula.
Type the interest rate the lender quoted. This is the rate applied to the loan balance before fees.
Type the total of any origination fees, discount points, or closing costs that the lender charges. Our APR calculator subtracts this from the loan principal to find the actual amount you receive.
The APR calculator shows the note rate, the true APR, the monthly payment, and the total cost (interest + fees). The APR is always equal to or higher than the note rate — the gap shows how much the fees add to your cost.
Find the annual percentage yield on a savings account or CD.
Calculate monthly loan payment, total interest, and repayment schedule.
Find how long it takes to pay off a credit card balance and the total interest.
Find the breakeven point and monthly savings from refinancing.