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A Unit Of Area is a measurement of 2-dimensional planar size. Units should have their equivalent given in the SI base unit, square meters.
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x name x image x Measurement System x Area In Square Meters (m²) x article
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x Square meter SquareMeterQuadrat International System of Units 1
The square metre (also spelled square meter, see spelling differences) is the SI derived unit of area, with symbol m (33A1 in Unicode). It is defined as the area of a square whose sides measure exactly one metre. The square metre is derived from the...
x Square mile 1 MileSquare Imperial unit system 2,589,988.11034
The square mile (sometimes written as mi²) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to the number of miles on each side squared....
US customary units
x Square kilometer   International System of Units 1,000,000
Square kilometre (U.S. spelling: square kilometer), symbol km, is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km is equal to: Conversely: Note: "km" means (km), square kilometre or kilometre...
x Acre   Imperial unit system 4,046.85642
The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre. One international acre is equal...
x Hectare   International System of Units 10,000
A hectare (symbol ha, pronounced /ˈhɛktɛər/) is a unit of area equal to 10,000 square metres (107,639 sq ft), or one square hectometre (100 metres, squared), and is commonly used for measuring land area. The hectare is used in most countries around...
Non-SI units accepted for use with SI
x Square yard   US customary units 0.83613
The square yard is an imperial/US customary (non-metric) unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre outside of the US. It is defined as the area of a square with sides of one yard...
Imperial unit system
x US survey acre   US customary units 4,046.87261  
x Barn     0
A barn (symbol b) is a unit of area. Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is used in all fields of high energy physics to express the cross sections of any scattering...
x Square foot   Imperial unit system 0.0929
The square foot is an imperial unit / U.S. customary unit (non-SI non-metric) of area, used mainly in the United States, the United Kingdom, and Canada. It is defined as the area of a square with sides of 1 foot (0.333... yards, 12 inches, or 0.3048...
US customary units
x Square inch     0.00065
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...
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