10 calculators
Converters
Length, weight, temperature, volume, speed, area — plus the date questions that are surprisingly awkward to do in your head. All exact conversions, done in your browser.
- Length converterConvert length between every common unit. Metres, feet, miles, inches and more.
- Weight converterConvert weight between every common unit. Kilograms, pounds, stone, ounces and grams.
- Temperature converterConvert temperature between every common unit. Celsius, Fahrenheit and Kelvin.
- Volume converterConvert volume between every common unit. Litres, gallons, cups, pints and spoons.
- Speed converterConvert speed between every common unit. mph, km/h, m/s and knots.
- Area converterConvert area between every common unit. Square metres, square feet, acres and hectares.
- Currency converterConvert between 30 currencies at the European Central Bank's published reference rates, with the date those rates were set.
- Age calculatorAn exact age in years, months and days — handling leap years and short months properly, which is where mental arithmetic goes wrong.
- Days between datesThe exact number of days between two dates, and what those dates fall on.
- Business days calculatorWorking days between two dates, weekends excluded. Note that it does not know your public holidays.