About WhatIsThatIn
WhatIsThatIn brings practical calculators and unit converters together in one place: from percentages, VAT and loans to working hours and dates, length, weight, temperature, shoe sizes and kitchen measures. Everything is free, needs no sign-up and runs right in your browser – on your phone, too.
Conversion factors follow the internationally agreed definitions, such as 1 inch = 2.54 cm or 1 pound = 0.45359237 kg. Every page shows the formula, the calculation and examples so you can follow and check each result yourself. Tax rates and other country-specific values are reviewed regularly.
All calculations run locally on your device. Your input is neither stored nor sent to us. The site is funded by advertising.
WhatIsThatIn is run by Jerome Falkenstein from Nuremberg, Germany. Found a mistake or missing a calculator? Write to us via the contact form – we appreciate every message.