Debt snowball
The smallest active balance receives the extra payment first, regardless of its interest rate.
Free Debt Calculator
Debt Payoff Calculator
Estimate how long it may take to pay off multiple debts, compare the snowball and avalanche methods, and see how additional monthly payments may change the result.
Mobile Tool Mode
Build a focused debt payoff estimate
Answer one question at a time in a dedicated mobile workspace. The normal MegaTools page returns when you exit.
01
Add your debts
Enter balances, interest rates, and minimum payments.
02
Set the monthly budget
Choose how much you can consistently put toward debt.
03
Review the estimate
See the payoff date, interest, and estimated payoff order.
Entries remain in this browser during the current session.
Results are estimates for planning purposes.
Step 1 · Build the payoff plan
Enter the debts you want to pay off
Add each current balance, annual interest rate, and minimum monthly payment. Then choose the total monthly amount and payoff strategy.
What the calculator compares
See how the repayment method changes the plan.
The calculator applies minimum payments to every active debt and directs the remaining monthly amount toward the next debt in the selected priority order.
Debt avalanche
The active debt with the highest annual interest rate receives the extra payment first.
Rolled payments
When one debt is paid, the available payment is redirected toward the next active balance.
Method and privacy:
Calculations run in the browser using monthly interest estimates.
Entries are not sent to MegaTools.tools or stored in a user account.
Actual lender calculations, fees, changing rates, and payment timing may differ.
Related money tools
Continue the calculation.
Common questions
Debt payoff calculator questions.
What is the debt snowball method? +
The debt snowball method directs extra money toward the debt with
the smallest balance. After that debt is paid, the available payment
moves to the next-smallest balance.
What is the debt avalanche method? +
The debt avalanche method directs extra money toward the active debt
with the highest annual interest rate. It often reduces total interest,
although the result depends on the balances and payments entered.
Why must the monthly budget cover every minimum payment? +
The calculator assumes every active account receives at least the
minimum payment. A monthly budget below the combined minimums cannot
produce a valid repayment schedule.
Why might the actual payoff date be different? +
Actual results can differ because of daily interest calculations,
fees, variable rates, new purchases, skipped payments, lender rules,
payment timing, and account changes.
Does this calculator save my financial information? +
No account or server-side saving is built into this page.
Calculations run in the browser during the current session.