These unit converters handle the conversions that come up whenever a recipe, a product listing or a worksheet uses a different system from the one you think in. They help travellers reading a forecast in Celsius, shoppers ordering shoes from a European brand, students switching between binary and decimal, and home cooks following an American recipe written in cups. Type a value and the converted answer appears straight away, so there is no need to remember factors or reach for a phone calculator.
How many centimetres are in an inch? Exactly 2.54. The inch has been defined that way by international agreement since 1959, so inch-to-centimetre conversions involve no approximation.
What is the quick way to convert Celsius to Fahrenheit? Multiply by 1.8 and add 32, so 20°C becomes 68°F. To go the other way, subtract 32 and divide by 1.8.
Why does an acre convert to different numbers of bigha? The bigha is a traditional land unit whose size varies from region to region across South Asia, so pick the local standard that applies to your land.
All of our unit converters are free, run in your browser and need no sign-up or download. Bookmark the ones you use most and they are a click away next time.