Credit Card Interest Calculator

Calculate credit card interest paid, payoff period, and total amount paid for any balance, APR, and monthly payment.

Formula

n = −log(1 − r·B ÷ P) ÷ log(1 + r) Total Paid = P × n Interest = Total Paid − B

How it works

A credit card interest calculator shows how long a balance takes to pay off and how much interest you'll pay at a given APR and monthly payment.

Example

Example: $5,000 balance at 22% APR with $200/month: r = 0.01833; n ≈ 33.7 months ≈ 2 yr 10 mo; interest ≈ $1,748.

Frequently Asked Questions

Disclaimer: Results are estimates for informational purposes only and should not be considered financial, medical, legal, or professional advice. Always consult a qualified professional before making decisions.