Unit of length
A unit of length is a way of measuring length or distance.
Related Topics:
Length - Distance
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Common units of length in the International System of Units (SI) are:
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- metre (or "meter" in US English) and its multiples, such as "centimetre" or "kilometre"
- fermi (fm) (= 1 femtometre in SI units)
- angstrom (Å) (= 100 picometres in SI units)
- micron (= 1 micrometre in SI units)
- inch (25.4 mm)
- foot (0.3048 m)
- yard (0.9144 m)
- (terrestrial) mile (~1609.344 m)
- fathom (for depth) (1.8288 m)
- nautical mile (1852 m)
- chain (~20.1m)
- pole, also called rod or perch (~5 m)
- furlong (~201 m)
- astronomical unit (AU) (~149 gigametres)
- light year (ly) (~9.46 petametres)
- parsec (pc) (~30.8 petametres), including kiloparsec (kpc) and megaparsec (Mpc)
- Planck length
- Bohr radius
- cana
- cubit
- league
- li (China)
- pace (the "double pace" of about 5 feet used in Ancient Rome)
- verst (Russia)
Non-SI units of length include:
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Common Imperial units and U.S. customary units of length include:
Related Topics:
Imperial unit - U.S. customary units
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In addition, the following are used by mariners...
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...and surveyors in the United States continue to use...
Related Topics:
Surveyor - United States
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...while horse racing keeps alive:
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Astronomical measure uses:
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Physics also uses:
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Archaic units of distance are described in the article on Ancient weights and measures. They include:
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