Purchase APR Calculator
Revolving balance interest — grace period only if you pay in full. Daily rate = APR ÷ 365.
daily rate = APR ÷ 365. Formula below amortizes the balance: pay = P·r ÷ (1 − (1+r)^−n), r = APR/12.Purchase Calculator
Carrying a balance? See the true cost before you swipe.
- Grace helps only if you pay in full — otherwise daily rate applies from day one.
- Lowest APR wins for balances > $1,500. For small balances that you pay off, No-Fee may win.
- Use the Balance Transfer calculator if you’re moving debt, not buying.
Frequently asked questions
What data does this page show?
Calculate revolving purchase interest: APR, grace period and monthly payments. CFPB TCCP official data.
What is purchase APR?
The yearly rate on carried balances — lower APR means cheaper revolving debt.
Fee card vs no-fee card?
Divide the annual fee by your monthly spend: high spenders often win with rewards cards.
How current are the figures?
All figures reflect 2026 and update automatically from official sources.
Where do the numbers come from?
All figures are compiled from official U.S. government public data and refreshed automatically. LifeIndexData is 100% free to use and fully independent: we are not affiliated with, sponsored by, or compensated by any bank, lender or financial institution, and advertising never influences our data or rankings.
How do I cite this page?
LifeIndexData. "Purchase APR Calculator — Credit Cards (2026)" (2026). https://lifeindexdata.com/usa/tools/cards/purchase/
Is this financial advice?
No. All data is informational only — see our Disclaimer before making decisions.