Calc & Convert Studio · 36 tools

Unit Converters

37 free unit converters for length, weight, temperature, volume, speed, pressure, energy, data and cooking, using exact definitions.

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All unit converters

About Unit Converters

This category lists 37 converters for the units people switch between most often. The Length Converter, Weight Converter and Temperature Converter handle metric and imperial everyday units, and the temperature tool also includes Kelvin, Rankine, Reaumur and Romer. Others cover area, volume, speed, time, pressure, energy, power, digital storage, fuel economy, cooking measures and number bases. Each converter shows a table of the value in every unit so you can compare at a glance.

Conversion factors are taken from their official definitions rather than rounded shortcuts: the international yard and pound of 1959, the US gallon of 231 cubic inches, the imperial gallon of 4.54609 litres and standard gravity of 9.80665 m/s2. Where two units share a name, such as US and imperial gallons, they are listed separately. The Cooking Converter lists US, metric and Japanese cups and US, metric and Australian tablespoons separately.

Frequently asked questions

Why do I get a different answer from another converter?
Many sites round factors, for example using 2.2 pounds per kilogram. These converters use exact definitions, so small differences appear in the later decimal places.
Can I convert cups to grams?
Not directly. Cups measure volume and grams measure weight, so the answer depends on the ingredient. The cooking converter converts between volume measures such as cups, spoons, fluid ounces and millilitres.
Does the data converter use 1000 or 1024?
Both. It lists decimal units (kB, MB, GB) and binary units (KiB, MiB, GiB) separately so you can see the difference.

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