Snowball Debt Calculator

How the Snowball Debt Calculator works

Formula. Each month the balance becomes balance × (1 + annual rate / 100 / 12) − payment, until the balance is 0 or 1,000 months pass. With a 0% rate, months = debt / payment rounded up. Total paid = payment × months.

Example. A $1,200 balance at 0% interest with a $100 payment takes ceil(1,200 / 100) = 12 months, and total paid is 100 × 12 = $1,200.

Limitation. The loop treats the whole balance as one debt, so it does not order multiple accounts the way the snowball method does, and it stops at 1,000 months.