A pace is a unit of

length Length is a measure of distance. In the International System of Quantities, length is a quantity with Dimension (physical quantity), dimension distance. In most systems of measurement a Base unit (measurement), base unit for length is chosen, ...

consisting either of one normal

walking Walking (also known as ambulation) is one of the main gaits of terrestrial locomotion among legged animals. Walking is typically slower than running and other gaits. Walking is defined as an " inverted pendulum" gait in which the body vaults o ...

step (approximately ), or of a double step, returning to the same foot (approximately ). The normal pace length decreases with age and some health conditions. The word "pace" is also used for units inverse to speed, used mainly for walking and running, commonly ''minutes per kilometer''. The word "pace" is also used to translate similar formal units in other systems of measurement. Pacing is also used as an informal measure in

surveying Surveying or land surveying is the technique, profession, art, and science of determining the land, terrestrial Plane (mathematics), two-dimensional or Three-dimensional space#In Euclidean geometry, three-dimensional positions of Point (geom ...

, with the "pace" equal to two of the surveyor's steps reckoned through comparison with a standard rod or chain.

Standardized units

Like other traditional measurements, the pace started as an informal unit of length, but was later standardized, often with the specific length set according to a typical brisk or military marching stride. In the United States the pace is an uncommon customary unit of length denoting a brisk single step and equal to .''U.S. Army Map Reading and Navigation'', p. 5.8, Skyhorse Publishing Inc., 2009 . The Ancient Roman pace () was notionally the distance of a full stride from the position of one heel where it raised off of the ground to where it set down again at the end of the step: two steps, one by each foot. Under Marcus Vipsanius Agrippa, it was standardized as the distance of two steps (') or five

Roman feet The units of measurement of ancient Rome were generally consistent and well documented. Length The basic unit of Roman linear measurement was the ''pes'' (plural: ''pedes'') or Roman foot. Investigation of its relation to the English foot goes ...

('), about . One thousand paces were described simply as ' or ', now known as a

Roman mile The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English ...

; this is the origin of the English term "mile". The

Byzantine The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the events that caused the fall of the Western Roman E ...

pace (, ''bḗma'') was an adaption of the Roman step, a distance of 2½ Greek feet. The double pace (, ''bḗma diploûn''), meanwhile, was similar to the Roman unit, comprising 5 Greek feet. The Welsh pace () was reckoned as 3 Welsh feet of 9

inch The inch (symbol: in or prime (symbol), ) is a Units of measurement, unit of length in the imperial units, British Imperial and the United States customary units, United States customary System of measurement, systems of measurement. It is eq ...

es and thus may be seen as similar to the English yard: 3 paces made up a leap and 9000 a Welsh mile.

References

Ancient Roman units of measurement Human-based units of measurement Units of length {{Ancient-Rome-stub

Standardized units

See also

References