Debt Snowball Calculator
Snowball against avalanche, with both interest totals shown.
Work out Debt Snowball. Snowball against avalanche, with both interest totals shown. Compounding frequency is an input, not an assumption.
Time to debt free
24 months
$453.10 in interest · 2 years
Snowball clears the smallest balance first; avalanche clears the highest rate first. Avalanche is always cheaper or equal in pure arithmetic — here the gap is $0.00. Snowball's case is behavioural rather than mathematical: clearing an entire debt early is a visible win, and people who see one are more likely to keep going. Both totals are shown so the trade is a choice rather than an argument.
How the Debt Snowball Calculator works
Snowball clears the smallest balance first; avalanche clears the highest rate first. Avalanche is always cheaper or equal in pure arithmetic — snowball's case is behavioural, and both totals are shown so the trade is a choice rather than an argument.
Also known as: debt avalanche calculator · snowball vs avalanche · debt payoff strategy calculator · debt free date calculator
Two orderings, one arithmetic
Both methods pay every minimum and put all spare money at one target debt, rolling the freed payment onward as each clears. The only difference is which debt is the target.
Snowball picks the smallest balance; avalanche picks the highest rate. Avalanche is always cheaper or equal, because killing the most expensive debt first removes the most future interest.
Why snowball still has a case
The argument for snowball is behavioural rather than mathematical. Clearing an entire debt is a visible, complete win, and people who get one early are measurably more likely to continue.
A plan that is followed beats a better plan that is abandoned. That is a real consideration, not a consolation prize — but it should be a decision made with the price attached, which is why both interest totals are shown here.
When the smallest balance is also the highest rate, the two methods coincide exactly and the question does not arise.
Frequently asked questions
What is the debt snowball method?
Paying minimums on everything and putting all spare money at the smallest balance, then rolling that payment onto the next smallest as each clears.
What is the avalanche method?
The same, but targeting the highest interest rate first. It always costs the same or less in interest, because it kills the most expensive debt soonest.
Which should I choose?
Avalanche if you will stick to it — it is mathematically better. Snowball if early visible wins keep you going, since a plan you abandon costs more than either. This page shows the interest difference so you can price that trade-off.
How much does the choice usually cost?
It depends on the spread of balances and rates. When the smallest debt is also the most expensive, the two methods agree exactly and the question does not arise.
Put this calculator on your own site
Free to use, on any site, commercial or not. Paste this where you want it to appear. It is a plain iframe, so it works in WordPress, Squarespace, Wix, Webflow, Ghost and anything else that accepts HTML.
<iframe src="https://www.thecalclibrary.com/embed/debt-snowball-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px" loading="lazy" title="Debt Snowball Calculator"></iframe>The only condition is that the credit line stays visible. It sits inside the frame, so you do not have to do anything to keep it.
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