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For other uses, see Acre (disambiguation).

The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. Area is a Quantity expressing the two- Dimensional size of a defined part of a Surface, typically a region bounded by a closed Curve. Imperial units or the Imperial system is a collection of units first defined in the British Weights and Measures Act of 1824 US customary units, also known in the United States as English units or Imperial units (in reference to the British Empire) (but see English The most commonly used acres today are the international acre and, in the United States, the survey acre.

One international acre is equal 4046. 8564224 m2. M^2 redirects here For other uses see M². CM2 redirects here One U. S. survey acre is equal to 62,726,400,000⁄15,499,969 = 4046. 8726098 m2.

The area of one acre (red) overlaid on an American football field
The area of one acre (red) overlaid on an American football field

One acre comprises 4,840 square yards or 43,560 square feet (which can be easily remembered as 44,000 square feet, less 1%). The square yard is an imperial / US customary (non- metric) unit of Area, formerly used in most of the English -speaking world but now The square foot is an Imperial unit / US customary unit (non- SI non- metric) of Area, used mainly in the United States Because of alternative definitions of a yard or a foot, the exact size of an acre also varies slightly. Originally, an acre was a selion of land one furlong long and one chain wide. Selion is a Mediaeval open strip of Land or small Field used for growing Crops usually owned by or rented to Peasants. A furlong is a measure of Distance in Imperial units and US customary units. A chain is a unit of Length; it measures 66 feet or 22 yards (20 However, an acre is a measure of area, and has no particular width, length or shape.

The acre is often used to express areas of land. In the metric system, the hectare is commonly used for the same purpose. The metric system is a decimalised system of measurement. It exists in several variations with different choices of base units, though the choice of base units does Explanation The hectare is commonly used in most countries around the world especially in domains concerned with land planning and management such as Agriculture, An acre is approximately 40% of a hectare.

One acre is 90. 75 yards of a 53. 33-yard-wide American football field. American football, known in the United States and Canada simply as football, is a competitive Team sport known for mixing strategy with The full field, including the end zones, covers approximately 1. 32 acres.

Contents

International acre

In 1958, the United States and countries of the Commonwealth of Nations defined the length of the international yard to be 0. The United States of America —commonly referred to as the A yard (abbreviation yd) is a unit of Length in several different systems including English units Imperial units and United 9144 meters. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International [1] Consequently, the international acre is exactly 4046. 8564224 square meters. M^2 redirects here For other uses see M². CM2 redirects here

United States survey acre

The United States survey acre is approximately 4046. 873 square meters; its exact value (4046+13,525,426⁄15,499,969 m²) is based on an inch defined by 1 meter = 39. M^2 redirects here For other uses see M². CM2 redirects here 37 inches exactly, as established by the Mendenhall Order. The Mendenhall Order marked a decision to change the fundamental standards of length and mass of the United States from the customary standards based on those of England to metric It is the standard acre in the United States, but the fractional difference from the international acre is only 40 millionths, or 4 ten-thousandths of one percent. The United States of America —commonly referred to as the

Equivalence to other units of area

1 international acre is equal to the following metric units:

1 United States survey acre is equal to:

1 acre (both variants) is equal to the following customary units:

1 international acre is equal to the following Indian unit:

Historical origin

The word "acre" is derived from Old English æcer (originally meaning "open field", cognate to Swedish "åker", German Acker, Latin ager and Greek αγρος (agros). Cognates in Linguistics are words that have a common origin They may occur within a language such as shirt and skirt as two English words descended from Swedish ( is a North Germanic language spoken by more than nine million people predominantly in Sweden and parts of Finland, especially along the The German language (de ''Deutsch'') is a West Germanic language and one of the world's major languages. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly

The acre was approximately the amount of land tillable by one man behind an ox in one day. Oxen (singular ox) are Cattle trained as draft animals. Often they are adult castrated males A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the This explains one definition as the area of a rectangle with sides of length one chain and one furlong. A chain is a unit of Length; it measures 66 feet or 22 yards (20 A furlong is a measure of Distance in Imperial units and US customary units. A long narrow strip of land is more efficient to plough than a square plot, since the plough does not have to be turned so often. The word "furlong" itself derives from the fact that it is one furrow long. The plough ( American spelling plow; both plaʊ is a Tool used in Farming for initial cultivation of soil in preparation for sowing seed

Before the enactment of the metric system, many countries in Europe used their own official acres. The metric system is a decimalised system of measurement. It exists in several variations with different choices of base units, though the choice of base units does These were differently sized in different countries, for instance, the historical French acre was 4221 square metres, whereas in Germany as many variants of "acre" existed as there were German states. Germany, officially the Federal Republic of Germany ( ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant is a Country in Central Europe.

Statutory values for the acre were enacted in England by acts of:

Historically, the size of farms and landed estates in the United Kingdom was usually expressed in acres (or acres, roods, and perches), even if the number of acres was so large that it might conveniently have been expressed in square miles. ROOD jong in de SP ( Dutch for RED young in the SP) is a Dutch youth wing linked to the Socialist Party. A perch is as a Unit of measurement used for length area and volume in a number of different systems of measurement For example, a certain landowner might have been said to own 32,000 acres of land, not 50 square miles of land.

Customary acre

The customary acre was a measure of roughly similar size to the acre described above, but was subject to considerable local variation. However, there were more ancient measures that were also used, including carucates, virgates, bovates, nooks, and farundells or farthingales. The carucate was a unit of assessment for tax used in most Danelaw counties of England, and is found for example in Domesday Book. The virgate was a unit of land area measurement used in medieval England, typically outside the Danelaw, and was held to be the amount of An Oxgang ( Danish: oxgang, Swedish: oxgång, Scottish Gaelic: Damh-imir, Medieval Latin: bovata) These may have been multiples of the customary acre, rather than the statute acre.

Other acres

References

  1. ^ National Bureau of Standards. A Scottish acre ( Scottish Gaelic: acair) was a Land measurement used in the country Several native systems of weights and measures were used in Scotland. An Irish acre is a unit of Area historically used in Ireland, Yorkshire, and regions bordering the Solway Firth. Refinement of Values for the Yard and the Pound.

See also

External links

Conversion of units refers to conversion factors between different Units of measurement for the same Quantity. An acre-foot is a unit of Volume commonly used in the United States in reference to large-scale water resources such as reservoirs, Aqueducts Vara A vara (abbreviation var) is an old Spanish and Portuguese unit of Length. In Australian and New Zealand English, a Quarter Acre is a term for a suburban plot of land

Dictionary

acre

-noun

  1. (obsolete) A field.
  2. A unit of surface area (symbol a. or ac.), originally as much as a yoke of oxen could plough in a day; later defined as an area 1 chain (22 yd) by 1 furlong (220 yd), or 4,840 square yards. Equivalent to about 4,046.86 squre metres.
  3. (in plural, informal) A large amount (of area).

Acre

-proper noun

  1. Old name of a city in modern Israel famed from the Crusades: see Acco.
  2. A state in north-western Brazil, bordering Peru and Bolivia.
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