interest calculator for credit card

Credit Card Interest Calculator | Free Tool to Calculate APR Charges by Day or MonthOur credit card interest calculator helps you

calculate credit card interest using a few simple inputs:

your balance, APR, billing cycle length, and optional mid-cycle payments.

It automatically converts APR → Daily Periodic Rate (DPR),

applies your Average Daily Balance (ADB), and shows both your estimated

monthly interest and the interest per day.

Monthly estimate: see how much you’ll pay this cycle based on APR and ADB.

Daily insight: view per-day charges to understand the true cost of carrying a balance.

Payment impact: test early or mid-cycle payments to see how they lower ADB and reduce interest.