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Unit converter

Convert length, weight, temperature, volume, area, and data size on one screen. An inch is 2.54 cm, and megabytes are not mebibytes.

Why this exists

Doing centimeters and inches in your head with 2.5 changes the last digits.

Calling MB and MiB the same name makes a large file look like a different size.

  1. 01How to use it

    Choose length, weight, temperature, volume, area, or data.

    Type the amount, then the unit you have and the unit you want. Swap exchanges only those two.

    Copy puts one line on the clipboard, such as 1 centimeter = 0.3937007874 inch.

  2. 02What you get

    One kilogram is 2.204622622 pounds, and one pound is 0.45359237 kilogram.

    One liter is 0.2641720524 US gallon. One square meter is 10.76391042 square feet.

    Entered1 cm → in

    1 cm → in 0.3937007874 inch
    1 kg → lb 2.204622622 pound
    100 °C → °F 212 °F
    1 GB → GiB 0.9313225746 gibibyte
  3. 03Worth knowing

    If kelvin would be below zero, the page says it is below absolute zero. That temperature does not occur.

    An acre is 4046.8564224 square meters.

    The decimal mark is a dot. A thousands comma is ignored.

    A negative length keeps its sign. A temperature below zero is converted as written.

Questions

QHow many inches are in one centimeter?
A0.3937007874 inch. One inch is exactly 2.54 centimeters.
QHow many pounds are in one kilogram?
A2.204622622 pounds. One pound is exactly 453.59237 grams.
QIs one gigabyte one gibibyte?
ANo. One gigabyte is 0.9313225746 gibibyte. A gigabyte is 1000 cubed.
QIs the number saved?
ANo. It stays in this browser and is not sent to a server.

How this page works it out

One inch is exactly 2.54 centimeters, and one pound is exactly 453.59237 grams. One centimeter is 0.3937007874 inch, and one kilogram is 2.204622622 pounds. The page does not round those factors to 2.5.

Fahrenheit is Celsius times 9/5, plus 32. 0 °C is 32 °F, 100 °C is 212 °F, and −40 is the same on both scales. A kelvin below zero is marked as below absolute zero. Volume is US liquid measure, and a US gallon is 3.785411784 liters.

A megabyte is a power of 1000 and a mebibyte is a power of 1024. One gigabyte is 0.9313225746 gibibytes. One square meter is 10.76391042 square feet, and one acre is 4046.8564224 square meters. The decimal mark on the result is a dot.

  • # centimeter
  • # inch
  • # pound
  • # Fahrenheit