Debt Snowball Calculator
Estimate how quickly you could pay off multiple debts using the debt snowball method and see your total interest and payoff time.
Overview
A debt snowball calculator helps you estimate how long it may take to clear multiple debts by paying minimums on all balances and putting extra money toward the smallest debt first. Enter each balance, APR, minimum payment, and your extra monthly payment to see an estimated payoff timeline and interest cost.
How it works
The calculator adds your balances and minimum payments, then includes your extra monthly payment to estimate your total debt payoff budget. It uses a weighted average APR to estimate overall interest and projects how many months it may take to become debt free. In a true debt snowball plan, once one debt is paid off, its payment is rolled into the next debt, helping the payoff speed up over time.
How to use this calculator
- 1Enter the balance for each debt in order from smallest to largest.
- 2Add the APR for each debt.
- 3Enter the required minimum monthly payment for every debt.
- 4Type the extra amount you can pay each month toward the smallest balance.
- 5Review the estimated payoff time, monthly payment total, and interest cost.
Example Calculation
Debt 1 balance
$2,000
Debt 1 APR
18%
Debt 1 minimum payment
$60
Debt 2 balance
$5,000
Debt 2 APR
22%
Debt 2 minimum payment
$150
Debt 3 balance
$9,000
Debt 3 APR
12%
Debt 3 minimum payment
$220
Extra monthly payment
$300
Estimated payoff time
N/A
In this example, the total debt is $16,000 and the monthly payment budget is $730. The calculator estimates a payoff period of around 27 months, with total interest that depends on the blended rate across the debts.
Frequently asked questions
What does a debt snowball calculator estimate?
It estimates how long it could take to pay off your debts, your total monthly payment, and the approximate interest you may pay when you focus extra money on the smallest balance first.
How is the debt snowball method different from the avalanche method?
The snowball method targets the smallest balance first for momentum, while the avalanche method targets the highest interest rate first to reduce interest more efficiently.
Do I need to list debts in a specific order?
Yes. For this calculator, enter debts from the smallest balance to the largest balance so the snowball estimate matches the intended payoff order.
Are the results exact?
No. The results are estimates because actual lender interest calculations, fees, changing rates, and payment dates can affect the real payoff schedule.
Should I include the extra payment in addition to minimum payments?
Yes. Enter your required minimum payments separately, then add the extra monthly amount you want to apply to the current snowball target.
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Assumptions and warnings
Assumptions
- Debts are entered in snowball order, with Debt 1 as the smallest balance and Debt 3 as the largest.
- You continue making at least the minimum payment on every debt until it is paid off.
- Any freed-up payment from a paid debt is rolled into the next debt.
- Interest is estimated using a weighted average APR, so results are approximate rather than exact.
- Payments are assumed to be made monthly and interest rates stay the same during the payoff period.
Warnings
- This calculator provides an estimate only and is not financial advice.
- Actual payoff timing and interest may differ based on lender rules, changing rates, fees, and payment timing.