MONEY FORMULA LAB

Free Financial Calculators & Money Tools

Simple calculators for savings, investing, borrowing, business finance, currency and forex — with clear formulas, explanations and worked examples.

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CALCULATOR LIBRARY

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Explore 18 free calculators covering savings, investing, borrowing, business finance, currency and forex.

CLEAR & TRANSPARENT

Understand the calculation, not just the answer

Money Formula Lab is designed around transparent formulas and plain-language explanations. Where practical, calculator pages include the formula used, assumptions, worked examples and common questions.

Browser-based tools: most calculator inputs are processed directly in your browser.

Educational purpose: results are estimates and are not personalised financial, investment, tax, legal or trading advice.

Methodology: assumptions, rounding and external data limitations are explained on our methodology page.

Corrections: users can report calculation issues through our contact page.