APR Calculator

Calculate annual percentage rate for loans, credit cards, and lender offers. Compare nominal interest rates, fees, APR, effective annual rate, payments…

Formula

How APR is calculated

APR estimates the true yearly cost of borrowing by comparing the payment stream with the amount of money the borrower actually receives after fees and prepaid finance charges.

Net loan proceeds = loan amount − finance charges
APR = annualized rate that matches payments to net proceeds
EAR = (1 + periodic rate)periods − 1

Borrowing comparison

Why APR matters when comparing offers

A lower interest rate is not always the cheapest offer if the lender charges higher fees. APR helps compare loan offers using both rate and costs, while the total-cost view helps when you plan to keep the loan for only a few years.

Credit card daily rate = APR ÷ 365
Monthly interest ≈ balance × monthly periodic rate

Use cases

When to use this APR calculator

Use it before comparing loan offers, reviewing credit card debt, checking lender fees, or deciding whether a lower rate is worth higher upfront costs.

Calculate APR from loan amount, nominal rate, term, fees, and prepaid interest

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Compare nominal interest rate versus annual percentage rate

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Estimate effective annual rate from different compounding frequencies

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Calculate daily periodic rate and monthly credit card interest

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Compare lender offers using rate, fees, APR, payment, and total cost

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Check how origination fees, points, and closing costs affect borrowing cost

Review the rate, fees, repayment timeline, and total borrowing cost before choosing an offer.

Calculator details

APR Calculator formula, assumptions, and examples

Last updated: July 2026

Formula used

Formula used

APR Calculator uses the values you enter to estimate totals, rates, percentages, payments, balances, or comparison results for planning.

Assumptions

Assumptions

  • The numbers entered are accurate and use the same currency or time period.
  • Rates, taxes, fees, deductions, and contribution rules can change.
  • Rounding, timing, and real-world provider rules may cause small differences.

Example calculation

Example calculation

Enter a simple apr calculator scenario, review the estimated result, then adjust one input at a time to compare outcomes.

When to use this calculator

When to use this calculator

Calculate APR from loan amount, nominal rate, term, fees, and prepaid interest

Disclaimer

Disclaimer

This calculator is for estimation and educational use only. It does not replace professional financial, tax, legal, mortgage, investment, or accounting advice.

Questions

Frequently Asked Questions

What is APR?

APR stands for annual percentage rate. It estimates the yearly cost of borrowing by combining the interest rate with certain upfront fees and loan costs.

Why is APR different from the interest rate?

The interest rate measures the cost of interest only. APR can be higher because it also reflects costs such as origination fees, points, prepaid interest, and other finance charges.

Can I use this calculator to compare lenders?

Yes. The lender comparison tab lets you compare offers using the same loan amount and term so you can see how interest rate and fees affect APR and total cost.

Does this calculator provide official APR disclosures?

No. Results are estimates only. Official APR disclosures come from lenders and may follow specific regulatory rules, fee inclusions, and rounding requirements.

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