A metre is the basic unit o lenth in the SI meisurment seestem. Bi the wey o an aerly defineition, it wis 1/10,000,000 (ae ten-milliont) o the lenth atween the Yird's equator an the North Powl. The metre is nou offeicially defined as the lenth licht gangs in a vacuum in 1/299,792,458 o a seicont.
Ither aften-uised units o lenth is the millimetre (seembol mm, equal tae 1/1000 m), centimetre (seembol cm, equal tae 1/100 m) an kilometre (seembol km, equal tae 1000 m)
- 1000 mm = 1 m
- 100 cm = 1 m
- 1 km = 1000 m