Kilometer is the common name of kilometer, which is called kilometer in English and expressed by the abbreviation km.

1 km =1000m =10000m =10000cm.

Extended data:

Kilometers are international standard units for length measurement. 1790 in may, a special Committee composed of French scientists suggested that one fortieth of the total length of the meridian of the earth passing through Paris should be used as the unit of length-meter. 1 km =1000m.

The unit of length refers to the basic unit for measuring spatial distance, which is formulated by human beings to standardize the length. Its international unit is "meter" (symbol "m"), and commonly used units are millimeter (mm), centimeter (cm), decimeter (dm), kilometer (km), meter (m), micron (micron) and nanometer (nm). In addition, there are English, China and other length units. See the following figure for common unit conversion:

References:

Length unit-Baidu Encyclopedia