100% Free, Independent Mathematical Calculators

Watch your debt melt away.

Enter what you owe, add whatever extra you can spare each month, and compare snowball against avalanche side by side: same debts, same extra payment, different order.

Quick Debt Payoff Calculator

Enter your total balances and see how much time and interest you save by adding an extra monthly payment.

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You save £5,224 and pay off 3 yrs 5 mos earlier!
By adding £150/mo to your £275 minimum payment.
Minimum Payments Only (£275/mo)
Payoff Date
May 2033 (6 yrs 9 mos)
Total Interest Paid
£9,646
Accelerated (£425/mo)
Accelerated Payoff Date
Dec 2029 (3 yrs 4 mos)
Total Interest Paid
£4,422
FCA-aware mathematical calculator

The Avalanche Strategy

Target the debt with the highest interest rate (APR) first while paying minimums on the rest. Mathematically minimizes the total interest you pay over the life of your debt.

The Snowball Strategy

Target the debt with the lowest balance first. Gives fast psychological wins by eliminating accounts early, building momentum to stay committed.

Regulatory Boundary

Our tools perform pure mathematical calculation on your entered numbers. We don't push loans or offer regulated financial advice: giving you clear, neutral facts.

Featured Educational Guides

Learn the math behind repayment formulas, compound interest, and strategy comparisons.

View All Guides (20)
Mathematical Explanations

The True Cost of a Missed Payment: Interest, Fees and Compound Effects

A mathematical breakdown of what happens when a credit card payment is missed: how interest compounds on the unpaid balance, how late fees add to the total, and what the long-term cost looks like over a full repayment period.

Case Studies & Hypothetical Scenarios

Case Study: How 'James' Cleared £8,000 of Credit Card Debt in 2 Years

A detailed hypothetical case study showing how one person mathematically structured a plan to pay off £8,000 across three credit cards in under 24 months using the Avalanche method.

Tool Guides & Calculations

How to Use a Debt Payoff Calculator to Build a Monthly Budget Plan

A step-by-step guide to using an itemized debt payoff calculator to model different payment scenarios, compare repayment timelines, and structure a monthly budget around becoming debt-free.

Terminology & Financial Concepts

What Is a Debt-to-Income Ratio and Why Does It Matter?

Learn what the debt-to-income ratio (DTI) is, how to calculate it using a straightforward formula, and why lenders and financial educators use it as a key measure of repayment capacity.

Ready to visualize your debt melting stack?

Build your itemized debt plan with individual credit cards, store cards, and loans in seconds.