m

What is a Meter?

Length Unit

Definition

The meter is the base unit of length in the International System of Units (SI). It is defined as the distance light travels in a vacuum in 1/299,792,458 of a second.

History

The meter was originally defined in 1793 during the French Revolution as one ten-millionth of the distance from the equator to the North Pole. It has been redefined several times, with the current definition based on the speed of light adopted in 1983.

Common Uses

  • Scientific measurements worldwide
  • Construction and engineering
  • Athletic track and field events
  • Everyday measurements in most countries

Fun Facts

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The word 'meter' comes from the Greek word 'metron' meaning 'measure'

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A meter is approximately the length of a long stride for an adult

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The meter is used by every country except the United States, Liberia, and Myanmar for everyday measurements

All Meter Conversions