The metre is the metric unit for distance. You can also use fractions like cm, or multiples like km.
Changes in distance are also measured. So the basic SI unit is a metre.
The 'meter' is the metric unit of any length or distance, no matter what direction.
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Meters
Meters
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kilometres
The metric unit for distance/length is the metre, but what kind of formula are you asking for?
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.
Meters
Metre
distance