What is the Credit Card Calculator?
The credit card calculator is a free online tool that helps you work out credit card quickly and accurately. It uses the standard formula Iterate monthly: balance grows by monthly rate, falls by payment and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter your card balance.
- Enter the interest rate (cards are high!).
- Enter your monthly payment.
- See the payoff time.
Formula used
Iterate monthly: balance grows by monthly rate, falls by paymentExplanation of each input
- Card balance โ the card balance used in the calculation.
- Annual interest rate (%) โ the annual interest rate used in the calculation.
- Monthly payment โ the monthly payment used in the calculation.
Understanding your result
- Months to clear โ the calculated months to clear.
- Total interest โ the calculated total interest.
Step-by-step calculation
For the example values 100000 at 36%, 5000/month:
- Apply the formula:
Iterate monthly: balance grows by monthly rate, falls by payment - Substitute the values: iterate
- Result: about 26 months
Worked example
| Inputs | 100000 at 36%, 5000/month |
|---|---|
| Working | iterate |
| Result | about 26 months |
Benefits and practical uses
This calculator saves you time and reduces errors when you need credit card. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Constant payment above monthly interest.
Frequently asked questions
Why clear cards fast?
Credit-card interest is very high (often 30-45% p.a.), so balances grow quickly.
Disclaimer: This calculator provides estimates for general information only and is not financial advice. Returns are illustrative and not guaranteed; consult a qualified financial adviser before making decisions.