SmartCalcy – free online calculators and converters for everyday sums

SmartCalcy.Quick answers for everyday sums

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SmartCalcy works entirely in your browser. Nothing you type is sent anywhere, and your last inputs are remembered on this device only. Results are estimates, so check labels, product details and official guidance before you buy or book.

Data credits

Public holidays: date-holidays by commenthol (ISC). Holiday data is CC BY-SA 3.0, mostly from Wikipedia; the holiday file served with this page is shared under the same licence.
English words: SCOWL, Copyright 2000-2016 by Kevin Atkinson, used under its permission notice, and an-array-of-english-words (MIT, © 2014 Zeke Sikelianos), derived from the Letterpress word list.
Spanish and French words: an-array-of-spanish-words and an-array-of-french-words (MIT, © Zeke Sikelianos), derived from the Letterpress word list.
Dutch words: an-array-of-dutch-words (MIT), derived from the OpenTaal word list (BSD / CC BY 3.0).
Currencies by country: country-to-currency (MIT).
Exchange rates: daily reference rates from the open fawazahmed0/exchange-api dataset (CC0), compiled from public sources. Intraday prices for major currencies and crypto from Coinbase, and for gold, silver, platinum and palladium from Swissquote (or gold-api.com when this page is hosted on its own website). For information only.