The kilogram is a unit used to measure weight. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about kilograms.
Kilogram Conversion Calculators
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Kilogram Definition and Usage
The definition of the kilogram changed in 2019. Previously, one kilogram was equal to the mass of the platinum-iridium bar, known as the International Prototype of the Kilogram, which was stored in Sèvres, France.
The kilogram, or kilogramme, is the SI base unit for weight, and is also a multiple of the gram. In the metric system, "kilo" is the prefix for 103. Kilograms can be abbreviated as kg, for example 1 kilogram can be written as 1 kg.
Background and Origin
Originally, the kilogram was defined in 1793 as the mass equal to one cubic decimeter of water and was adopted by France as the base unit of mass.
It was later adopted for use internationally, but in 1889 it was redefined as the mass equal to that of a platinum-iridium bar called the International Prototype Kilogram. For a period of time, the kilogram was the only unit in the international system of measures that is defined using a physical artifact.
In 2019 the kilgoram was redefined again using the Planck constant, meters, and seconds, removing the dependence on a physical artifact for the definition.
Kilograms Measurement Conversion Table
|kilograms||tons||pounds||ounces||metric tons||long tons||grams||milligrams||carats|
|1 kg||0.001102 t||2.204623 lb||35.273962 oz||0.001 t||0.000984 lt||1,000 g||1,000,000 mg||5,000 ct|
|2 kg||0.002205 t||4.409245 lb||70.547924 oz||0.002 t||0.001968 lt||2,000 g||2,000,000 mg||10,000 ct|
|3 kg||0.003307 t||6.613868 lb||105.821886 oz||0.003 t||0.002953 lt||3,000 g||3,000,000 mg||15,000 ct|
|4 kg||0.004409 t||8.81849 lb||141.095848 oz||0.004 t||0.003937 lt||4,000 g||4,000,000 mg||20,000 ct|
|5 kg||0.005512 t||11.023113 lb||176.36981 oz||0.005 t||0.004921 lt||5,000 g||5,000,000 mg||25,000 ct|
|6 kg||0.006614 t||13.227736 lb||211.643772 oz||0.006 t||0.005905 lt||6,000 g||6,000,000 mg||30,000 ct|
|7 kg||0.007716 t||15.432358 lb||246.917734 oz||0.007 t||0.006889 lt||7,000 g||7,000,000 mg||35,000 ct|
|8 kg||0.008818 t||17.636981 lb||282.191696 oz||0.008 t||0.007874 lt||8,000 g||8,000,000 mg||40,000 ct|
|9 kg||0.009921 t||19.841604 lb||317.465658 oz||0.009 t||0.008858 lt||9,000 g||9,000,000 mg||45,000 ct|
|10 kg||0.011023 t||22.046226 lb||352.739619 oz||0.01 t||0.009842 lt||10,000 g||10,000,000 mg||50,000 ct|
|11 kg||0.012125 t||24.250849 lb||388.013581 oz||0.011 t||0.010826 lt||11,000 g||11,000,000 mg||55,000 ct|
|12 kg||0.013228 t||26.455471 lb||423.287543 oz||0.012 t||0.01181 lt||12,000 g||12,000,000 mg||60,000 ct|
|13 kg||0.01433 t||28.660094 lb||458.561505 oz||0.013 t||0.012795 lt||13,000 g||13,000,000 mg||65,000 ct|
|14 kg||0.015432 t||30.864717 lb||493.835467 oz||0.014 t||0.013779 lt||14,000 g||14,000,000 mg||70,000 ct|
|15 kg||0.016535 t||33.069339 lb||529.109429 oz||0.015 t||0.014763 lt||15,000 g||15,000,000 mg||75,000 ct|
|16 kg||0.017637 t||35.273962 lb||564.383391 oz||0.016 t||0.015747 lt||16,000 g||16,000,000 mg||80,000 ct|
|17 kg||0.018739 t||37.478585 lb||599.657353 oz||0.017 t||0.016732 lt||17,000 g||17,000,000 mg||85,000 ct|
|18 kg||0.019842 t||39.683207 lb||634.931315 oz||0.018 t||0.017716 lt||18,000 g||18,000,000 mg||90,000 ct|
|19 kg||0.020944 t||41.88783 lb||670.205277 oz||0.019 t||0.0187 lt||19,000 g||19,000,000 mg||95,000 ct|
|20 kg||0.022046 t||44.092452 lb||705.479239 oz||0.02 t||0.019684 lt||20,000 g||20,000,000 mg||100,000 ct|
- International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9.pdf