Calculators · Guides · No sign-up

Do the maths on your money, before you decide

Eight free calculators and clear guides for mortgages, loans, savings, debt and retirement. Every formula is shown, and nothing you type leaves your device.

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How we keep this trustworthy

We show the formula

Every calculator page explains the maths and includes a worked example you can check by hand.

No data collected

Calculations happen in your browser. There are no accounts, and we never ask for personal details.

Honest about limits

We say plainly when a figure is an estimate and where rules differ by country. See our editorial policy.

Frequently asked questions

Are the calculators free to use?

Yes. Every calculator is free, needs no account and runs in your browser, so the numbers you type stay on your device.

Which countries is the site written for?

Examples use dollars by default, and you can switch the currency symbol to pounds, euros, Canadian or Australian dollars. Rules and rates vary by country, so we point you to official sources.

Are the results financial advice?

No. They are educational estimates built on stated formulas. Speak to a qualified professional before making major financial decisions.

Who writes the guides?

Mr Umer researches and writes every guide and builds each tool. Our editorial policy explains how we keep content accurate.

Know your numbers

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