Conversions calculators
Convert length, weight, temperature, area, volume, speed, data and time units instantly.
Length Converter
Convert between meters, centimeters, millimeters, kilometers, inches, feet, yards and miles.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin with the exact formulas.
Weight Converter
Convert kilograms, grams, pounds, ounces, stone and tons in either direction.
Area Converter
Convert square meters, square feet, acres, hectares, square miles and more.
Data Storage Converter
Convert bits, bytes, KB, MB, GB, TB and their binary equivalents (KiB, MiB, GiB, TiB).
Speed Converter
Convert between km/h, mph, meters per second, knots and feet per second.
Time Unit Converter
Convert seconds, minutes, hours, days, weeks, months and years.
Volume Converter
Convert liters, milliliters, US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons and cubic units.
Exact conversion factors
The converters use the exact definitions set by international agreement: one inch is exactly 2.54 centimeters, one pound is exactly 0.45359237 kilograms and one US gallon is exactly 231 cubic inches. Results are shown to ten significant figures, and each page lists the value in every unit at once.