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  2. Square foot - Wikipedia

    en.wikipedia.org/wiki/Square_foot

    Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar ...

  3. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    Length. For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use. From 1893, the foot was legally defined as exactly 1200⁄3937 m (approximately 0.304 8006 m). [13] Since July 1, 1959, the units of length have been defined on the basis of 1 yd = 0 ...

  4. Traditional French units of measurement - Wikipedia

    en.wikipedia.org/wiki/Traditional_French_units...

    A square 5 perches on each side, or one quarter of an acre. acre, or. arpent carré. 48 400. ~5107 m 2. ~6108 sq yd, or. ~1.262 acres. The French acre is a square 10 perches (one arpent) on each side. (Does not exactly correspond to the English acre, which is defined as 43 560 square feet.)

  5. Square inch - Wikipedia

    en.wikipedia.org/wiki/Square_inch

    1 / 1296 ⁠ sq yd. A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches: The square inch is a common unit of measurement in the United States and the United Kingdom. A common unit of pressure, pound per square inch (psi) is derived ...

  6. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to ⁠1/36⁠ yard or ⁠1/12⁠ of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other ...

  7. Foot (unit) - Wikipedia

    en.wikipedia.org/wiki/Foot_(unit)

    The foot (standard symbol: ft) [ 1 ][ 2 ] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [ 3 ] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in ...

  8. English units - Wikipedia

    en.wikipedia.org/wiki/English_units

    The furlong went from 600 old feet (200 old yards) to 660 new feet (220 new yards). The acre went from 36,000 old square feet to 43,560 new square feet. Scholars have speculated that the Compositio may have represented a compromise between the two earlier systems of units, the Anglo-Saxon and the Roman.

  9. Japanese units of measurement - Wikipedia

    en.wikipedia.org/wiki/Japanese_units_of_measurement

    The base unit of Japanese area is the tsubo, equivalent to a square ken or 36 square shaku. It is twice the size of the jō, the area of the Nagoya tatami mat. Both units are used informally in discussing real estate floorspace. [20] Due to historical connections, the tsubo is still used as the official base unit of area in Taiwan. [citation ...

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