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Unit converter

Type something like "100 F", "5 ft 11 in to cm" or "2 cups to ml" in the quick box, or pick a category and units below.

Popular conversions

Converters by category

Number tools

What you can do here

  • Two-way conversion: type in either box and the other one updates. The middle button swaps the units.
  • Maths and fractions: entries such as "12*3", "1 1/2" or "½" work.
  • Every unit at once: the table below shows the same value in every unit of the category. Tap a unit name to switch to it.
  • Feet and inches, pounds and ounces: 180 cm is also shown as 5 ft 10.87 in.
  • Traditional units: Korean, Japanese and Chinese units such as the pyeong, shaku, catty and shō are included.

Conversion factors follow the SI and each unit's official definition, and you can choose how many decimal places to show. Copy the address bar link to share exactly what you are looking at.

FAQ

Is Unitly free?
Yes. There is no sign-up, and nothing you type is stored anywhere.
My result differs slightly from another site.
That is almost always rounding. With decimal places set to Auto you see up to 10 significant digits. Values that depend on conditions, such as Mach or the weight of a cup of flour, state the assumption used.