The kilogram (kg) is the SI unit of mass. It is equal to the mass of the international prototype of the kilogram. This prototype is a cylinder of platinum-iridium alloy, which is kept at the International Bureau of Weights and Measures (BIPM) in Sèvres, France. Is kg and kgs the same? There is no difference between "kg" and "kgs." They are both abbreviations for the word "kilogram."
Should the K in kg be capitalized? There is no definitive answer to this question, as there is no universally accepted style guide for writing about units of measure. In general, however, it is considered acceptable to capitalize the letter K when referring to the unit of measure known as a kilogram.
How is a kilogram defined?
The kilogram is the unit of mass in the metric system, and is currently defined as the mass of the international prototype kilogram (IPK), a cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures (BIPM) in Sèvres, France. The IPK is the only object in the world whose mass is officially defined by a physical artifact, rather than by a fundamental physical constant. Is it 5 kg or 5 kgs? There is no difference between "5 kg" and "5 kgs." Both are correct and there is no need to worry about which one to use. How do you write per kg in short? Per kilogram (kg) is a unit of measurement for weight or mass. The short form for per kg is "p/kg" or "pkg".