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The "old English mile" of the medieval and early modern periods varied but seems to have measured about 1.3 international miles (2.1 km). [17] [18] The old English mile varied over time and location within England. [18] The old English mile has also been defined as 79,200 or 79,320 inches (1.25 or 1.2519 statute miles). [19]
1,760 yards: On 1 July 1959, the imperial mile was standardized to an exact length in metres 1,609.3472 (statute) mile: United States: 1893: today: 1,760 yards: From 1959; also called the U.S. Survey Mile. From then its only utility has been land survey, before it was the standard mile. From 1893 its exact length in metres was: 3,600 / ...
A metric mile or an Olympic mile is a colloquial term used in some countries for the 1500 meters, the premier middle distance running event in international track and field. The term 'metric mile' (0.93 statute miles) was applied to this distance because it approximates one statute mile (1609.344 m). [ 1 ]
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
For example, in 1980, high schools converted their running distances from Imperial (yards) to metric, but instead of running conventional international distances like 1500 metres in place of the mile run, a more equitable but non-standard 1600 meters was chosen. For the two-mile run, they run 3200 meters.
The modern sprinting events have their roots in races of imperial measurements which were later altered to metric: the 100 m evolved from the 100-yard dash, [7] the 200 m distance came from the furlong (or 1 ⁄ 8 mile), [8] and the 400 m was the successor to the 440-yard dash or quarter-mile race. [1]
The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links. [1] [2] There are 10 chains in a furlong, and 80 chains in one statute mile. [2] In metric terms, it is 20.1168 m long. [2]
The 100-yard dash is a track and field sprint event of 100 yards (91.44 metres). It was part of the Commonwealth Games until 1970 , and was included in the triathlon of the Olympics in 1904 . It is not generally used in international events, replaced by the 100-metre sprint (109.36 yards).