Debt Avalanche Calculator
Pay highest-rate debt first.
Enter your values
Enter the total balance in $.
Enter the weighted average rate in %.
Enter the monthly payment in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Months to debt free
- 45
- Years
- 3.8
- Total paid
- $31,344.48
- Total interest
- $9,344.48
- Interest share of payments
- 29.81%
Quick answer
The avalanche method pays minimums on everything and throws every spare dollar at the highest interest rate, minimising total interest.
At a glance
| What it does | Pay highest-rate debt first. |
|---|---|
| Category | Finance |
| Inputs needed | Total balance, Weighted average rate, Monthly payment |
| Main output | Months to debt free |
| Cost | Free — no sign-up, no download |
How to use the Debt Avalanche Calculator
- 1Add up your total balances.
- 2Enter your weighted average interest rate.
- 3Enter the total monthly payment you can commit.
Inputs explained
- Total balance($)
- Enter the total balance in $.
- Weighted average rate(%)
- Enter the weighted average rate in %.
- Monthly payment($)
- Enter the monthly payment in $.
Worked example
Using the values the calculator loads with:
Inputs
- Total balance22000 $
- Weighted average rate19.9 %
- Monthly payment700 $
Results
- Months to debt free45
- Years3.8
- Total paid$31,344.48
- Total interest$9,344.48
- Interest share of payments29.81%
Frequently asked questions
Avalanche or snowball?
Avalanche saves the most money; snowball clears small balances faster for motivation.
Does it matter much?
On mixed-rate debt, avalanche typically saves 5–15% of total interest.
What do I need to enter into the Debt Avalanche Calculator?
Just 3 values: total balance, weighted average rate, monthly payment. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Debt Avalanche Calculator work out the answer?
The avalanche method pays minimums on everything and throws every spare dollar at the highest interest rate, minimising total interest. The working is shown step by step so you can verify the result by hand.
Is the Debt Avalanche Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.