Debt Snowball vs Avalanche Calculator
Enter your debts once and see the two strategies compared line by line — debt-free date, total interest, number of payments, and how much the avalanche method saves for your specific balances.
Your Debts
How to read this comparison
Both methods pay the minimum on every debt and then throw all remaining money at one target debt. The only difference is the target:
- Debt snowball targets the smallest balance first, ignoring interest rate.
- Debt avalanche targets the highest APR first, ignoring balance size.
For an identical monthly payment, avalanche produces equal or lower total interest and an equal or earlier debt-free date — it is never mathematically worse. What the calculator shows you is how much that difference actually is for your debts. When your rates are close together, the gap is often just a few dollars and a month or two; when you have one expensive balance, it can be substantial.
Snowball target = smallest remaining balance
Avalanche target = highest remaining APR
Freed minimum payments roll into the next target when a debt closes
Frequently Asked Questions
For the same total monthly payment, the debt avalanche method always results in equal or lower total interest and an equal or earlier payoff date, because it eliminates the highest-rate balance first. The snowball method can still be the better choice if closing small accounts quickly helps you stay consistent.
It depends entirely on your debts. When your interest rates are close together, the two methods finish within a month or two of each other and the interest difference is small. When you have one high-rate balance alongside larger low-rate balances, avalanche can save meaningfully more.
Yes. It is completely free with no signup, and every calculation runs locally in your browser. Your numbers are never sent to a server or stored.