Conversion Units2014

What is a meter?

In 1791 the meter was intended to equal 10-7 or one ten-millionth of the length of the meridian through Paris from pole to the equator.To reduce uncertainty in this measurement,

The meter is now the length of the path traveled by light in vacuum during a time interval of 1/299,792,458 of a second.

speed of light in vacuum at exactly 299 792 458 m·s-1

SI multiples of meter

Multiple Name Symbol Multiple Name Symbol100 meter m101 decameter dam 10–1 decimeter dm102 hectometer hm 10–2 centimeter cm103 kilometer km 10–3 millimeter mm106 megameter Mm 10–6 micrometer µm109 gigameter Gm 10–9 nanometer nm

1012 terameter Tm 10–12 picometer pm1015 petameter Pm 10–15 femtometer fm1018 exameter Em 10–18 attometer am1021 zettameter Zm 10–21 zeptometer zm1024 yottameter Ym 10–24 yoctometer ym