XinY Units - Convert length units from Kilometres to Metres
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The kilometre, or kilometer in American English, is a unit of length in the metric system, equal to one thousand metres. Many people know a marathon race is 26.2 miles long but did you know that a marathon is 42.195 in kilometres?
The metre, or meter, is the base unit of length in the International System of Units (SI). The SI unit symbol is m. The metre is currently defined as the length of the path travelled by light in a vacuum in 1/299,792,458 of a second. The current world record for running 100 metres is 9.58 seconds, set by Usain Bolt in 2009.