Convert Kilometers To Millimeters
|
This measurement conversion is based on a simple rule: 1 km = 1000000 mm The kilometre (American spelling: kilometer), symbol km, is a unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in 1/299,792.458 of a second.
The millimetre (American spelling: millimeter), symbol mm, is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length.