Debt Avalanche Calculator – Save the Most on Interest

Use this debt avalanche calculator to create a complete debt payoff plan that saves you the most money on interest. Add your debts, set an extra monthly payment, and the tool sorts them from highest to lowest interest rate — showing you exactly when each debt will be paid off. Whether you’re tackling credit cards, student loans, or personal loans, this debt avalanche calculator gives you the most cost-effective path to becoming debt-free.

Debt Avalanche Calculator
Total Debt —
Total Interest Paid —
Debt-Free Date —
Total Months —
⚠️ Illustrative only. Not financial advice. Please delete history timely, it may impact your browser performance.

History — Debt Avalanche Calculator

# Time Extra Monthly Payment Compounding Number of Debts Total Debt Total Interest Months to Payoff Debt-Free Date Action

Why Use This Debt Avalanche Calculator

The debt avalanche method is the most financially efficient way to pay off debt. This calculator helps you:

  • 📋 Organize Your Debts — list all your debts in one place.
  • 📈 Create a Payoff Plan — see exactly when each debt gets paid off.
  • 💰 Save the Most Money — pay the least amount of interest overall.
  • 🔁 Test Scenarios — see how extra payments accelerate your payoff.
  • 📜 Track Your History — save, review, and export past calculations to CSV or Excel.
  • 🔒 100% Private — all calculations run locally; your data never leaves your browser.

How the Debt Avalanche Method Works

  1. List your debts from highest interest rate to lowest interest rate.
  2. Pay minimums on all debts.
  3. Put all extra money toward the highest-rate debt until it’s paid off.
  4. Roll that payment to the next highest-rate debt.
  5. Repeat until all debts are paid off.

How to Use This Debt Avalanche Calculator

  1. Select your account currency from the picker in the site header.
  2. Click “Add Debt” and enter:
    • Name — e.g., “Credit Card 1”, “Student Loan”
    • Balance — the current outstanding balance
    • Interest Rate — the annual interest rate (APR)
    • Minimum Payment — the minimum monthly payment
  3. Add as many debts as you have.
  4. Enter your extra monthly payment beyond the minimums.
  5. The tool updates instantly — see your debt-free date, total interest paid, and a complete payoff timeline.

Frequently Asked Questions

What is the debt avalanche method?

The debt avalanche method involves listing your debts from highest to lowest interest rate, paying minimums on all debts, and putting any extra money toward the highest-rate debt until it’s paid off. Then you roll that payment to the next highest-rate debt — saving the most money on interest.

How is this different from the debt snowball method?

The debt avalanche targets the highest interest rate first, saving the most money in interest. The debt snowball targets the smallest balance first, providing psychological wins and momentum. This calculator uses the avalanche method.

What happens when I pay off a debt?

The payment you were making on the paid-off debt (minimum payment + any extra) rolls to the next debt. This accelerates your payoff.

Can I add more debts later?

Yes — you can add, edit, or remove debts at any time. The calculator updates instantly.

Is my data stored anywhere?

No. All calculations run locally in your browser. History and presets are saved in your browser’s localStorage — nothing is sent to a server.