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The kilogram (kilogramme, kgkg) is a unit of mass. It is 10001000 grams (grammes, gg).

One kilogram may soon be defined to be the mass of NN atoms of the carbon? isotope C 12\mathrm{C}^{12}, where NN is 100012\frac{1000}{12} times the Avogadro number. Currently, however, this fact is actually the definition of the Avogadro number; instead, the kilogram is defined as the mass of a certain physical object kept by the BIPM in Paris.

Last revised on December 21, 2013 at 03:07:30. See the history of this page for a list of all contributions to it.