How to Calculate Credit Card
What is Credit Card?
A credit card calculator shows how long it takes to pay off a balance and how much interest accrues, with options for minimum payment versus fixed monthly payment strategies.
Formula
Interest = balance × (APR / 100 / 12) × months; Total payment = principal + interest
- B
- Card balance (currency)
- APR
- Annual Percentage Rate (%)
- I
- Interest charge (currency)
Step-by-Step Guide
- 1Interest compounds monthly at APR/12
- 2Minimum payment: typically 1–2% of balance or a fixed floor
- 3Fixed payment: reduces balance faster, saves significant interest
- 4Avalanche: pay highest APR first; Snowball: pay smallest balance first
Worked Examples
Input
$3,000 balance, 24% APR, minimum payment ~$60
Result
Payoff: 7+ years; Total interest > $2,000
Frequently Asked Questions
What's the difference between APR and interest rate?
APR includes fees and is more realistic. Nominal rate = APR without fees. APR typically higher.
How is credit card interest calculated?
Daily balance method: (balance × daily APR × days in period). APR / 365 = daily rate.
Can paying minimum balance avoid interest?
No. Interest accrues on remaining balance. Minimum payments mostly cover interest, little principal.