Enter your debts once. See both methods side by side, your projected debt-free date, and which one actually saves you money.
Snowball = Smallest debt paid off first.
Avalanche = Largest interest rate paid off first.
Your debts
Name
Balance
APR %
Min payment
This calculator assumes fixed interest rates, on-time payments, and no new charges added to any balance. Actual payoff timelines can vary with rate changes, fees, or missed payments. Not financial advice — for guidance on your specific situation, consider a nonprofit credit counselor (many offer free consultations through the National Foundation for Credit Counseling).
How to read your results
Both methods pay the same minimum on every debt every month — the difference is where your extra payment goes. Snowball sends it to your smallest balance first, so you clear individual debts faster and see progress sooner. Avalanche sends it to your highest interest rate first, which minimizes the total interest you pay over the life of the payoff.
As each debt is paid off, its minimum payment doesn't disappear — it rolls into the extra amount going toward the next debt in line. That's the "snowball" effect both methods share: your payoff power grows every time you clear a balance, even though your total monthly budget stays the same.
Frequently asked
What is the difference between debt snowball and debt avalanche?
The debt snowball method pays off your smallest balance first regardless of interest rate, aiming for quick psychological wins. The debt avalanche method pays off your highest interest rate first, which mathematically minimizes total interest paid.
Which is better, snowball or avalanche?
Avalanche almost always saves more money in interest, but snowball's quick wins help many people stay motivated and actually finish. The better method is whichever one you'll stick with — this calculator shows you both so you can decide with real numbers.
How much extra should I pay toward debt each month?
As much as you can afford without jeopardizing rent, food, or an emergency cushion. Even a modest extra amount, like $50 to $100 a month, meaningfully shortens payoff time because it goes entirely toward principal instead of interest.