Units of area

decimal multiple of the SI unit of surface area

thumb|Image comparing the hectare (the small blue area at lower left) to other units. The entire yellow square is one square mile. The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), that is, 10,000 square metres (10,000 m2), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about and thus one hectare is about . thumb|St. Enda's GAA ground, in Omagh. The playing field used in [[Gaelic football and hurling is a little over a hectare in size.]] In 1795, when the metric syste

SI unit of area

The acre ( ) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. The acre is sometimes abbreviated ac, but is usually spelled out as the word "acre".

unit of area

thumb|Tatami mat in Enkō-ji

A dunam (Ottoman Turkish, Arabic: ; ; ; ), also known as a donum or dunum and as the old, Turkish, or Ottoman stremma, was the Ottoman unit of area analogous in role (but not equal) to the Greek stremma or English acre, representing the amount of land that could be ploughed by a team of oxen in a day. The legal definition was "forty standard paces in length and breadth", but its actual area varied considerably from place to place, from a little more than 900 m2 in Ottoman Palestine to around 2 500 m2 in Iraq.

unit for cross-sectional

imperial unit and U.S. customary unit of area

A desiatina, also known as desyatina, desiatin or desyatin (), is a historical measure of area used in Russian Tsardom and Russian Empire for land measurement. A desiatina is equal to 2,400 square sazhens and is approximately equivalent to 2.702 English acres, 10,925 square metres, or 1.09 hectare.

A morgen (Mg) is a historical, but still occasionally used, German unit of area used in agriculture. Officially, it is no longer in use, having been supplanted by the hectare. While today it is approximately equivalent to the Prussian morgen, measuring 25 ares or 2,500 square meters (), its area once ranged from , but usually between . In the 20th century, the quarter hectare became standard for one morgen. The Morgen unit of land measurement was also used in the Netherlands, Poland, Lithuania, and parts of the Dutch colonial empire, such as South Africa. It was also used in the Balkans, Norwa

historical unit of area

A toise (; symbol: T) is a unit of measure for length, area and volume originating in pre-revolutionary France. In North America, it was used in colonial French establishments in early New France, French Louisiana (Louisiane), Acadia (Acadie) and Quebec. The related '''''' () was used in Portugal, Brazil, and other parts of the Portuguese Empire until the adoption of the metric system.

unit of area

A feddan () is a unit of area used in Egypt, South Sudan, Sudan, Syria, and Oman. In Classical Arabic, the word means 'a yoke of oxen', implying the area of ground that could be tilled by oxen in a certain time. In Egypt, the feddan is the only non-metric unit which remained in use following the adoption of the metric system. A feddan is divided into 24 kirat (, qīrāt), with one kirat equalling 175 square metres.

The jugerum or juger (, ', ', or '''') was a Roman unit of area, equivalent to a rectangle 240 Roman feet in length and 120 feet in width (about 71×35m), i.e. 28,800 square Roman feet () or about hectare (0.623 acre).

An arpent (, sometimes called arpen) is either of two units of measure, a unit of length or a unit of area. It is a pre-metric French unit based on the Roman actus. It is used in Quebec, some areas of the United States that were part of French Louisiana, and in Mauritius and the Seychelles.

unit of area

unit of land

The stremma ( stremmata; , strémma) is unit of land area used mainly in Greece and Cyprus, equal to 1,000 square metres or approximately acre.

A pyeong (abbreviationpy) is a Korean unit of area and floorspace, equal to a square kan or 36square Korean feet. The ping and tsubo are its equivalent Taiwanese and Japanese units, similarly based on a square bu (ja:步) or ken, equivalent to 36square Chinese or Japanese feet.

Chinese unit of area; today standardized as ⅔×1000 square metres (666,7 m²)

English unit of length or area

Scandinavian unit of area

{|style="float:right; padding:0 0 2em 3em; " | {| class="wikitable" style="float:right; padding:0 0 2em 3em;" |+Comparison of Area units |- !colspan="3"|jerib to metric/English |- !jerib||m-ft||ha-acre |-align="right" |1 jerib (Iran) |10,000 m2 |1 hectare |-align="right" |1 jerib (Iran) |107,639 ft2 |2.4711 acre |-align="right" |1 jerib (Afghan) |2,000 m2 |0.2 hectare |-align="right" |1 jerib (Afghan) |21,760 ft2 |0.4942 acre |- !colspan="3"|metric/English to jerib |- !units||jerib (Iran)||jerib (Afghan) |-align="right" |1 ha |1 jerib (I) |5 jerib (A) |-align="right" |1 acre |0.4049

Alqueire is a traditional unit of measurement in Portuguese. The term has been documented in Portugal since the 12th century. It is derived from the Arabic word أَكْيَال (al-kayl), which roughly means 'measure'. It was originally used to measure the amount of dry goods (such as grain) a pack animal could carry, in the form of satchels or baskets. In Portugal, the alqueire was used as a measure of capacity and eventually it was used also as a measure of area of productive land. The spread of Portuguese culture took both meanings of the word to different parts of the world.

A mansus, sometimes anglicised as manse, was a unit of land assessment in medieval France, roughly equivalent of the hide. In the 9th century AD, it began to be used by Charlemagne to determine how many warriors would be provided: one for every three (later four) mansi, with smaller landholders collectively forming groups of three (later four). The mansus was also used to determine the amount of equipment expected.

Russian unit of land measure (13th–17th centuries)

A bunder or bonnier is an obsolete unit of area previously used in the Low Countries (Belgium and the Netherlands).

ancient unit of length and area

unit of area

thumb|Tables of conversion between Jersey vergées and English acres from an 1891 almanac

Unit of land area used in Argentina and Central American countries

A quinaria (plural: quinariae) is a Roman unit of area, roughly equal to square centimeter|. Its primary use was to measure the cross-sectional area of pipes in Roman water distribution systems. A "one quinaria" pipe is in diameter.

The virgate, yardland, or yard of land ( ['''']) was an English unit of land. Primarily a measure of tax assessment rather than area, the virgate was usually (but not always) reckoned as  hide and notionally (but seldom exactly) equal to 30 acres. It was equivalent to two of the Danelaw's oxgangs. __NOTOC__

The '''''' () was a unit of land measurement in the Spanish viceroyalties in the Americas during the times of the Spanish Empire in the 16th through 19th centuries. It was equivalent to . The unit came from Spain, where it had already been in use.

An åtting (also known in Continental Scandinavian languages as atting, åttung, , or otting, and in Icelandic as áttungur), literally meaning an "eighth", is a historical unit of measurement in Scandinavia. The term has had a wide variety of uses.