An are (symbol a) is a unit of area, equal to 100 square meters (10 m × 10 m), used for measuring land area. It was defined by older forms of the metric system, but is not part of the modern metric system, the International System (SI). It is accepted, but not encouraged, for use with the SI. Area is a physical quantity expressing the size of a part of a surface. ... A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... Look up si, Si, SI in Wiktionary, the free dictionary. ...

It is commonly used in many countries—in particular, in French-, Portuguese-, Polish- Dutch- and German-speaking countries—to measure real estate; elsewhere, the square meter is usually used. The are is sometimes used in combination with the centiare, e.g. "10 ares 12 centiares" = 1012 m². Larger land areas are generally measured in hectares. The decare is commonly used in the former Ottoman countries, usually under local names. Other 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 Thai rai, 16 a. A hectare (symbol ha) is a unit of area, equal to 10 000 square metres, commonly used for measuring land area. ... Decare is a unit for the measurement of area. ... Motto دولت ابد مدت Devlet-i Ebed-müddet (The Eternal State) Anthem Ottoman imperial anthem Borders in 1680, see: list of territories Capital Söğüt (1299–1326) Bursa (1326–65) Edirne (1365–1453) Constantinople (Ä°stanbul, 1453–1922) Language(s) Ottoman Turkish Government Monarchy Sultans  - 1281–1326 Osman I  - 1918–22 Mehmed VI... An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple. ... A rai (Thai ไร่) is a unit of area, equal to 1,600 square metres (40 m × 40 m), used for measuring land area. ...

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 (are x 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, a nature preserve, or the country's lone golf course. Dacha of Boris Pasternak in Peredelkino. ... A typical allotment plot, Essex, England Allotment gardens are characterized by a concentration in one place of a few or up to several hundreds of land parcels that are assigned to individual families. ...

Conversions

One are is equivalent to:

Metric

• 0.0001 km² (square kilometers)
• 0.01 ha (hectares)
• 1 dam² = 10 m × 10 m (a square 10 meters on a side)
• 100 m² (square meters)(sotka (russian))
• 100 ca (centiares)

A kilometer (Commonwealth spelling: kilometre), symbol: km is a unit of length in the metric system equal to 1,000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... A hectare (symbol ha) is a unit of area, equal to 10 000 square metres, commonly used for measuring land area. ... A decametre (American spelling: decameter) (symbol: dam) is a measurement of distance equal to ten metres. ... A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. ... A centiare (symbol ca) is a unit of area, equal to 1 square meters, used in some countries for measuring small land areas, usually in combination with ares, e. ...

English units

• 0.000 038 610 2 square miles (statute)
• 0.024 710 538 international acres
• 0.024 710 439 U.S. survey acres
• 1076.39 square feet

The Imperial units are an irregularly standardized system of units that have been used in the United Kingdom and its former colonies, including the Commonwealth countries. ... A square mile is an English unit of area equal to that of a square with sides each 1 statute mile (≈1,609 m) in length. ... An acre is the name of a unit of area in a number of different systems, including Imperial units and United States customary units. ... An acre is the name of a unit of area in a number of different systems, including Imperial units and United States customary units. ... A square foot is by definition the area enclosed by a square with sides each 1 foot long. ...

Other

• 0.1 stremma

The stremma (στρέμμα, plural στρέμματα) is a Greek unit of land area, equal to 1000 square metres, also called the royal stremma. ...

See also

• 1 E2 m² for a comparison with other areas

To help compare sizes of various objects, we list here areas between 100 m² and 1,000 m². Most private homes and four bedroom apartments fall in this size range. ...

External links

• Official SI website: Table 8. Other non-SI units currently accepted for use with the International System (Their use is not encouraged.)