About Unitly

Unitly converts 16 kinds of units: length, weight, area, volume, temperature, speed, time, data size, data rate, pressure, energy, power, fuel economy, angle, frequency and cooking measures. It also has tools for screen sizes, number bases, Roman numerals and writing numbers in words.

Conversion factors follow the SI and each unit's official definition. Exact definitions are used as they are, such as 2.54 cm per inch and 0.45359237 kg per pound. Values that depend on conditions, such as Mach or the weight of a cup of flour, are labeled with the assumption used. Everything runs in your browser and nothing you type is stored.

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