For other uses, see Kilo (disambiguation).
Look up kilo- in Wiktionary, the free dictionary.
kilo is a unit prefix in the metric system denoting multiplication by one thousand. It has been used in the International System of Units where it has the unit symbol k, in lower case.
The prefix kilo is derived from the Greek word χίλιοι (chilioi), meaning "thousand". It was originally adopted by Antoine Lavoisier's research group in 1795, and introduced into the metric system in France with its establishment in 1799.
one kilogram is 1000 grams,
one kilometre is 1000 metres,
one kilojoule is 1000 joules,
one kilobaud is 1000 bauds,
one kilohertz is 1000 hertz,
one kilobit is 1000 bits,
one kilobyte (kB) is 1000 bytes (but has also been used for another value, which is not standard).,
When units occur in exponentiation, such as in square and cubic forms, any multiplier prefix is considered part of the unit, and thus included in the exponentiation.
1 km means one square kilometre or the area of a square that measures 1000 m on each side or 10 m (as opposed to 1000 square meters, which is the area of a square that measures 31.6 m on each side).,
1 km means one cubic kilometre or the volume of a cube that measures 1000 m on each side or 10 m (as opposed to 1000 cubic meters, which is the volume of a cube that measures 10 m on each side).