Unit Converter

Convert length, weight, temperature, area, volume, speed, time, data size, pressure, energy, fuel economy and angle units, and see every unit of the category at once.

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How to use

  1. Pick a category such as Length, Weight or Temperature.
  2. Type a value and choose its unit. Thousands separators (1,250) and spaces are ignored, a decimal comma such as 3,5 also works, and 1e3 style numbers work.
  3. The table shows the value in every unit of that category at once; the row of the unit you typed is in bold.
  4. Use the copy button on a row to copy that value without thousands separators.

Frequently asked questions

How precise are the results?
Conversions use the defined values of each unit (for example 1 inch = 2.54 cm exactly) and are shown with up to 12 significant digits. Very large or small values are shown in exponent form, such as 1.6e-19.
Which gallon, cup and mpg are used?
US units, unless marked UK. The US gallon is 3.785411784 L and the UK gallon is 4.54609 L.
What are pyeong, geun, don and ja?
Traditional Korean units still used in daily life: 1 pyeong = 400/121 m² (about 3.3058 m²), 1 geun = 600 g, 1 don = 3.75 g, 1 ja = 10/33 m, 1 doe = 2401/1331 L (about 1.804 L), 1 mal = 10 doe.
Is KB 1000 or 1024 bytes?
KB, MB, GB and TB are decimal (1000). KiB, MiB, GiB and TiB are binary (1024). Operating systems often show binary sizes with decimal names.