APR Calculator

Find a loan effective APR once upfront fees are included, so you can compare offers fairly. Enter the loan, rate, term, and fees.

Loan amount ($)

Interest rate (%)

Term (years)

Fees ($)

Effective APR

— %

Fees included.

Usage Tip

When comparing loans, line up the APRs, not the headline rates — a lower rate with high fees can cost more.

THE MATH

APR is the rate where the present value of all payments equals the amount you actually receive (loan minus fees).
Solved numerically from payment, term, and net proceeds.

The nominal rate ignores fees; APR includes them, so APR is the better number for comparing loan offers.
With no fees, APR equals the nominal rate.

APR assumes you keep the loan to term; paying off early makes the effective cost of upfront fees higher.
APR does not include within-year compounding (that is APY); for savings, compare APY instead.
Lenders must disclose APR, which makes it the fairest cross-lender comparison.

The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.