Credit Card Interest

Estimate interest from an average balance.

Your numbers

Enter your numbers to see the result.

How Credit Card Interest works

Estimated interest = average balance × APR ÷ 100 × billing days ÷ 365. Actual card statements may use daily balances, grace periods or different terms.

A worked example

These sample values illustrate the calculation. Use your own numbers in the calculator for your result.

Example inputs

Average balance: 2000
APR (%): 22
Days: 30

Estimated interest: $36.16

Assumptions and limits

Rates, fees and contribution schedules are the assumptions you enter. This estimate does not include changes you have not entered.

Educational estimate only. This is not personalized financial, investment or tax advice.