Unit Converter

A unit converter translates a measurement from one unit system to another — feet to metres, kilograms to pounds, Celsius to Fahrenheit, litres to gallons, acres to square metres. Unit conversion is required in science, engineering, cooking, fitness, construction, travel, and everyday life because different countries and fields use different measurement systems.

The world primarily uses two measurement systems: the International System of Units (SI / metric) — used by most countries for science and everyday life — and the Imperial / US Customary system — still used in the United States, United Kingdom, and a few other countries for some measurements. Converting between these systems accurately requires knowing the exact conversion factors, which vary in complexity (temperature conversion, for example, involves not just multiplication but also addition of an offset).

Altairys's Unit Converter covers over 200 units across 15 categories: Length, Weight/Mass, Temperature, Area, Volume, Speed, Pressure, Energy, Power, Data Storage, Time, Angle, Frequency, Fuel Efficiency, and Currency. Enter a value in any unit and see all equivalent values across the entire category simultaneously. The tool is ideal for students studying physics and chemistry, cooks adapting international recipes, travellers checking distances, engineers reviewing foreign specifications, and fitness enthusiasts tracking metrics.