Credit card and loan balances accrue interest monthly, so a fixed payment amount takes longer to clear a balance than the simple division of balance by payment would suggest. This calculator simulates the payoff month by month, applying interest before each payment.
Enter your current balance, interest rate, and planned monthly payment to see exactly how many months it will take to reach zero, along with the total interest you'll pay over that time and the grand total paid.
If your monthly payment doesn't even cover the monthly interest charge, the balance would never shrink — this calculator flags that situation clearly so you know a higher payment is needed to make real progress.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from search result to working tool in a couple of seconds.
Frequently asked questions
Why does a small payment increase never seem to help much?
Because early payments go mostly toward interest, a small increase can still meaningfully reduce total months and interest paid, though the effect compounds more the earlier you increase it.
What happens if my payment is too low?
If the payment doesn't exceed the monthly interest charge, the balance will never decrease — the calculator will flag this so you know a higher payment is required.