Free online finance calculators, in one box.
10 free calculators for finance are live today, with more publishing every week. No signup, and almost every calculator runs entirely in your browser.
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Calculators
LiveEvery page shows the formula, a worked example and the steps.
Converters
SoonUnits, currency, time zones, files & formats.
Generators
SoonPasswords, UUIDs, QR codes & secure tokens.
Text tools
SoonCounters, case conversion & formatting utilities.
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All 10 calculators1 category inside the Calculators family.
What every calculator page shows
Every calculator here shows its working. You get the formula it uses, a worked example with real numbers, and an FAQ covering the questions that usually follow, so you can check a result instead of taking it on trust. Nothing asks you to sign up, and almost every calculator runs entirely in your browser.
Where a quantity has more than one accepted definition, the page says so rather than quietly picking one, and where an authority publishes a worked example, that example is pinned as a test. If a number here disagrees with a source you trust, that is a bug worth reporting.