Converters
Unit conversions based on exact definitions, plus number-base and scientific-notation converters that work on arbitrarily large integers.
Length ConverterConvert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles using exact definitions.Area ConverterConvert between square meters, square kilometers, square centimeters, square feet, acres and hectares.Volume ConverterConvert between milliliters, liters, cubic meters, cubic centimeters, US gallons and cups.Mass ConverterConvert between milligrams, grams, kilograms, metric tons, ounces and pounds.Speed ConverterConvert between meters per second, kilometers per hour, miles per hour and knots.Temperature ConverterConvert between Celsius, Fahrenheit and Kelvin with the conversion formula shown; rejects values below absolute zero.Time ConverterConvert between milliseconds, seconds, minutes, hours, days, weeks and years.Number Base ConverterConvert whole numbers of any size between binary, octal, decimal, hexadecimal and any base from 2 to 36.Scientific Notation ConverterConvert numbers to and from scientific, engineering and standard decimal notation exactly, with optional rounding to significant figures.