Free Debt Snowball Calculator
Enter your debts below, add whatever extra you can pay each month — even $25 — and see your debt-free date, total interest, and exact payoff order instantly. Everything runs right here in your browser: no signup required, and nothing is sent anywhere unless you choose to save your plan. Some example debt accounts have been added; edit, add or remove them as needed.
| Debt name | Balance | APR % | Min. payment |
|---|
Your balance over time
This plan Minimum payments only
Your payoff order
| # | Debt | Balance | APR | Paid off | Interest paid |
|---|
Month-by-month payment schedule
This is exactly where each dollar goes every month. Watch the payments roll: when a debt disappears, its column empties and the next debt's payment jumps.
Like what you see? Make it a real plan.
This calculator shows a snapshot. A free Undebt.it account keeps this plan updated every time you make a payment, tracks your progress, and shows your debt-free date getting closer every month.
Takes about a minute. No credit card needed. Your debts above carry over automatically — no re-typing.
How the debt snowball calculator works
The debt snowball method lines up your debts from smallest balance to largest. You pay the minimum on everything, and your extra payment goes at the smallest debt until it's gone. Then that entire payment — minimum plus extra — rolls onto the next debt on the list. With each payoff your payment gets bigger, and the next debt falls faster. That's the snowball.
This calculator runs that exact simulation month by month with your numbers: it accrues interest on each balance, applies your payments, retires debts in order, and rolls freed-up minimums forward until every balance hits zero. Flip the method toggle to avalanche and it re-runs the same simulation ordered by interest rate instead — the comparison line under your results shows you exactly what the difference would be, in dollars and months, so you can decide with real information instead of internet arguments.
Want the full story on why the snowball works and when the avalanche makes more sense? Read how the debt snowball & avalanche methods work. Once you get signed up, there's plenty of help along the way if you need it. Check out how Undebt.it works for some more detailed information.