Meters (m) to Kilometers (km) Conversion

Meters

The metre is the SI base unit of length, defined since 1983 as the distance light travels in a vacuum in exactly 1/299,792,458 of a second, anchoring its definition to a universal physical constant rather than any material artefact. Introduced by the French Academy of Sciences in 1791 as one ten-millionth of the distance from the equator to the North Pole, the metre became the cornerstone of the metric system and is today the official unit of length in every country that has adopted SI. In science and engineering, virtually all derived units of length, area, volume, and many physical quantities are expressed in terms of the metre.

Kilometers

The kilometre, equal to exactly 1,000 metres, is the standard unit for measuring distances at a geographic and infrastructural scale, including road distances, flight paths, and the dimensions of countries and continents. It is derived directly from the metre by applying the SI prefix kilo- (from Greek khilioi, meaning thousand) and is universally used in science, meteorology, and everyday life in all countries that have adopted the metric system. The Earth's circumference at the equator is approximately 40,075 km, a value historically used in the original derivation of the metre itself.

Convert Meters (m) to other units of Length