If you define 'distance' as the shortest line between to objects. (Example: the moon and the Earth; or say, Suburb A and Suburb B, then such distances are measured in Metre if the distance is shorter than around about 1 Kilometre, or,. If the distance is greater than a few hundred Metre, it is always measured in Kilometre.
meter meter
The metre (meter in the USA) is the base unit of length in the metric system. It is equal to the distance light travels in a vacuum in a time interval of 1/299792458 of a second.
The official system of measurements is the SI; it has SEVEN base units.
The SI unit for length is the meter, but for longer distances the kilometer is used. There are 1000 meters in a kilometer.
Metre
meter meter
The 'meter' is the metric unit of any length or distance, no matter what direction.
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kilometres
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The metric unit for distance/length is the metre, but what kind of formula are you asking for?
The metre (meter in the USA) is the base unit of length in the metric system. It is equal to the distance light travels in a vacuum in a time interval of 1/299792458 of a second.
The metric unit for distance is the metre which is roughly 39.4 inches.
The official system of measurements is the SI; it has SEVEN base units.
The SI unit for length is the meter, but for longer distances the kilometer is used. There are 1000 meters in a kilometer.