Debt Payoff Calculator
Compare the snowball and avalanche strategies across all your debts — see months to debt-free and total interest.
Payoff order (highest rate first): Card A → Card B
The snowball strategy would take 36 months and cost $1,902.76 in interest.
Estimates for education only — not financial advice. Assumes fixed rates and a constant total monthly budget (freed-up minimums roll into the next debt).
How it works
- 1Add each debt with its balance, rate, and minimum payment.
- 2Set an extra monthly budget and pick a strategy.
- 3See months to debt-free, total interest, and the payoff order.
Use cases
- Decide between the snowball and avalanche methods.
- See how an extra $100/month changes your debt-free date.
- Plan the order to attack multiple cards or loans.
Frequently asked questions
Snowball vs avalanche?
Snowball pays the smallest balance first (quick wins, motivation). Avalanche pays the highest rate first (least total interest). This tool shows both.
How is the budget applied?
Each month every debt gets its minimum, then all remaining budget goes to the target debt. When a debt is cleared, its minimum rolls into the next one (the classic method).
Is my data stored?
No. Everything runs in your browser.
Related tools
See all →Calculate the monthly payment, total interest, and payoff date on any fixed-rate loan.
Estimate your monthly mortgage payment, total interest, and PITI with a per-year interest chart.
See how a lump sum grows with compound interest — pick the compounding frequency and watch the curve.
Add sales tax to a price, or extract the tax already included in a total.