Kilometre
A kilometre (or kilometer) (or km) is a unit of length equal to 1000 metres. See 1 E3 m to compare the length of a kilometre. See also: SI, metre, SI prefix, Orders of magnitude, light year External link Conversion Calculator for Units of LENGTH (http://www.ex.ac.uk/cimt/dictunit/ccleng.htm)
See 1 E3 m to compare the length of a kilometre.
See also: SI, metre, SI prefix, Orders of magnitude, light year