CB
Everyday tool
Credit Card Interest Calculator
See a rough monthly interest cost on a revolving credit card balance.
Instant useNo sign up, quick result.
Clear outputMade for fast practical checks.
Related next stepsJump to supporting tools after.
Use the credit card interest calculator
Estimate monthly card interest from balance and APR.
Result: waiting for input
Enter your values to see the result.
Formula
Monthly interest ≈ balance × (APR ÷ 12)
Example
A higher APR or balance increases monthly interest costs quickly.
Frequently asked questions
Is APR the same as monthly rate?
No. This tool converts APR into a simple monthly estimate.
Will this match my exact statement?
Not always. Issuers may use different methods and timings.
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