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CalculatorFox is a library of 1,336 free online calculators across finance, tax, business, health, fitness, math, construction, conversions, education, engineering and more. Unlike basic calculator sites that only show a final number, CalculatorFox shows the calculation step by step and cites the sources behind the method where applicable. Every calculator can be used without an account, and website owners can embed calculators on their own sites for free. Free accounts add saved calculations, private links, and PDF/CSV exports. The Personal plan adds unlimited saves, side-by-side comparisons, reusable assumption profiles, custom-colour embeds, and embeds without the CalculatorFox credit link. CalculatorFox is built for individuals, businesses, publishers, advisers, and anyone who wants calculations that are easier to understand, verify, save, share, or embed.