Are 60631 223974764 2008-07-06T19:47:57Z Reade 757089 {{Otheruses4|the unit of area}} {| class="wikitable" style="float:right; margin:0 0 0.5em 1em;" |+Comparison of Area units !Unit||nearest SI||SI base |-align="right" |1&nbsp;ca |1&nbsp;m<sup>2</sup> |1&nbsp;m<sup>2</sup> |-align="right" |1&nbsp;a |1&nbsp;dam<sup>2</sup> |10<sup>2</sup>&nbsp;m<sup>2</sup> |-align="right" |1&nbsp;ha |1&nbsp;hm<sup>2</sup> |10<sup>4</sup>&nbsp;m<sup>2</sup> |-align="right" |100&nbsp;ha |1&nbsp;km<sup>2</sup> |10<sup>6</sup>&nbsp;m<sup>2</sup> |- !colspan="3"|non-SI comparisons |- !non-SI||metric||SI base |-align="right" |119.6 sq&nbsp;yard |1&nbsp;a |10<sup>2</sup>&nbsp;m<sup>2</sup> |-align="right" |1076.39 sq&nbsp;ft |1&nbsp;a |10<sup>2</sup>&nbsp;m<sup>2</sup> |} '''Are''' (symbol '''a''', {{IPAEng|ɛə(r) or ɑə(r)}}) is a unit of [[area]], equal to 100 [[square metre]]s (10&nbsp;m × 10&nbsp;m), used for measuring land area. It was defined by older forms of the [[metric system]], but is now outside of the modern [[SI|International System]] (SI). <ref>{{cite web|url=http://www.bipm.org/en/si/si_brochure/|title=SI brochure (8th edition)|accessdate=|year=2006|month=March|publisher=BIPM}}</ref> It is commonly used in many countries—in particular, in [[French language|French]]-, [[Portuguese language|Portuguese]]-, [[Polish language|Polish]]- [[Dutch language|Dutch]]- and [[German language|German]]-speaking countries—to measure real estate; elsewhere, the square metre is usually used. The are is sometimes used in combination with the centiare, ''e.g.'' "10 ares 12 centiares" = 1012&nbsp;m<sup>2</sup>. Larger land areas are generally measured in [[hectare]]s. The [[decare]] is commonly used in the former [[Ottoman Empire|Ottoman]] countries, usually under [[dunam|local names]]. Other [[SI prefix|prefixes]] for multiples and submultiples of the ''are'' are not in common use. There are other local units which are exact multiples of the are, ''e.g.'' the [[Thailand|Thai]] [[Rai (area)|rai]], 16&nbsp;a. The are is the standard unit of measurement for private plots of land (as opposed to large industrial and agricultural properties) in Russia and all the countries of the former Soviet Union. But since the original root word "are" has never been in use in Russian, and only the word "hectare" exists as a unit of land measurement, the Russian word for "are" is "sotka" (сотка), which roughly translates as "hundredth". Thus, the Russian language regards the hectare as the "root" unit of measurement, and a "sotka" is essentially a "centihectare", or (1&nbsp;a × 100 ÷ 100). City dwellers in the former USSR use the term "sotka" to describe the size of their suburban [[dacha]] or [[allotment garden]] plots or small city parks; country dwellers or wealthy suburban homeowners use it to describe the size of the private yards around their houses, small private orchards, and the like. Hectares are used to describe larger plots of land, such as a factory complex, a collective farm, a university campus, or a nature preserve. ==Conversions== ''One are is equivalent to:'' ===Metric=== * 0.0001&nbsp;[[kilometre|km]]<sup>2</sup> (square kilometres) * 0.01&nbsp;[[hectare|ha]] (hectares) * 1&nbsp;[[decametre|dam]]<sup>2</sup> = 10&nbsp;m × 10&nbsp;m (a square 10 metres on a side) * 100&nbsp;[[Square metre|m<sup>2</sup>]] (square metres) * 100&nbsp;[[centiare|ca]] (centiares) ===English units=== * 0.000&nbsp;038&nbsp;610&nbsp;2 [[square mile]]s (statute) * 0.024&nbsp;710&nbsp;538 international [[acre]]s * 0.024&nbsp;710&nbsp;439 U.S. survey [[acre]]s * approximately 1076.39 [[square foot|square feet]] ==Other== * 0.1 [[stremma]] ==See also== *[[1 E2 m²]] for a comparison with other areas ==References== {{Reflist}} ==External links== *[http://physics.nist.gov/cuu/Units/outside.html US NIST Reference on SI], Table 7. Other units outside the SI that are currently accepted for use with the SI, subject to further review. Note that this source refers to BIPM SI 7th edition. Reference should be made to BIPM SI 8th edition. [[Category:Units of area]] [[ast:Área (unidá de superficie)]] [[bg:Ар]] [[cs:Ar (jednotka plochy)]] [[da:Ar (enhed)]] [[de:Ar (Flächenmaß)]] [[et:Aar]] [[es:Área (unidad de superficie)]] [[eo:Aro (mezurunuo)]] [[eu:Area]] [[fr:Are]] [[hr:Ar]] [[ko:아르]] [[id:Are]] [[it:Ara (unità di misura)]] [[lb:Ar (Flächemooss)]] [[nl:Are]] [[ja:アール]] [[no:Ar]] [[nn:Ar]] [[pl:Ar (jednostka miary)]] [[pt:Are]] [[ro:Ar]] [[ru:Ар]] [[sk:Ár]] [[sl:Ar (enota)]] [[sr:Ар (јединица)]] [[sh:Ar (jedinica)]] [[fi:Aari (yksikkö)]] [[th:อาร์ (หน่วยวัด)]] [[uk:Ар]] [[zh:公畝]]