Debt Snowball Calculator

Payoff-time math for one combined balance at your average APR and monthly payment. It does not order multiple debts smallest-first—use it as a quick single-loan estimate.

Total debt balance Average APR (%) Monthly payment budget

Result
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How this calculation works

What each input means

Total debt balance — One combined principal modeled as a single amortizing loan (the “snowball” label describes the strategy concept, not smallest-balance ordering in this tool).
Average APR (%) — Monthly rate r = APR ÷ 100 ÷ 12.
Monthly payment budget — Applied until the balance is paid.

Formula used

Same payoff-months math as the avalanche page here: one-balance amortization closed form using log of payment ratio.

Does not simulate paying smallest balances first across multiple accounts—only one combined principal.

How this result is estimated

This debt payoff strategy calculator applies the formulas described on this page to the values you enter. Outputs are not financial, tax, legal, or medical advice.

Inputs are user-provided and may include rounding.
Where accuracy, eligibility, or obligations matter, rely on official disclosures and licensed professionals.

Last reviewed: 2026-04-17

Frequently asked questions

Is this calculator result exact?

It is an estimate based on your inputs and may differ from official or provider-specific calculations.

Does this site provide financial, tax, or legal advice?

No. Each tool applies explicit formulas to values you supply. Financial, tax, and legal conclusions belong with licensed professionals and official documents.

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