Unit Converter

Unit Converter handles the conversions that come up in ordinary life: centimetres to inches for a piece of furniture, kilograms to pounds for luggage, millilitres to cups for a recipe, Celsius to Fahrenheit for a forecast, and kilometres per hour to miles per hour when driving somewhere that measures differently.

Seven categories are covered. Length runs from millimetres to miles and includes nautical miles. Weight covers milligrams to tonnes with ounces, pounds and stones. Volume spans millilitres to gallons and includes both the US and imperial versions of pints, quarts and gallons, which are different sizes and a frequent source of ruined recipes. Temperature covers Celsius, Fahrenheit and Kelvin. Area, speed and digital storage round out the set.

Pick a category, type a value, and every unit in that category shows the equivalent at once. Seeing the whole column rather than one answer is often what you actually wanted, because it tells you immediately whether the right unit for the job is centimetres or metres.

• Seven categories covering everyday measurements
• Every unit in the category shown at once
• Separate US and imperial volume units, which differ in size
• Celsius, Fahrenheit and Kelvin with correct offsets
• Sensible rounding that keeps small values readable
• Swap button to reverse a conversion
• Copy any result

The unit converter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Converting a recipe written in another country's units
• Checking luggage weight against an airline limit
• Reading furniture or room dimensions given in inches
• Converting a speed limit or a distance while travelling
• Working out how many megabytes a gigabyte allowance holds