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One acre equals 1 ⁄ 640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, [2] or about 4,047 square metres (0.4047 hectares) (see below).While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends upon the particular yard on which it is based.
1.0 hm 2 (2.5 acres) square decametre: dam2 Q23931040: dam 2: US spelling: square dekameter: 1.0 dam 2 (1,100 sq ft) square metre: m2 Q25343: m 2: US spelling: square meter: 1.0 m 2 (11 sq ft) m2 sqft; square decimetre: dm2 Q3331719: dm 2: US spelling: square decimeter: 1.0 dm 2 (16 sq in) square centimetre: cm2 Q2489298: cm 2: US spelling ...
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
Image comparing the hectare (the small blue area at lower left) to other units. The entire yellow square is one square mile.. The hectare (/ ˈ h ɛ k t ɛər,-t ɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land.
The area of the fields thus increased from a side of 100 ordinary cubits (a half acre of 21,797 sq ft.) to twice that (an acre of 43,514 sq ft) when plowed by oxen, to three times that (one and one half acres 65,391 sq ft) when plowed with horses, to a two acre khet of (89,004 sq ft) measured with sides of 100 royal cubits to an aroura with ...
A decimal is one hundredth of an acre of land, [2] and is equal to 48.4 square yards or 435.6 square feet (40.47 m 2). [1] Decimals are also used as a measure of land in West Africa. [ citation needed ]
[1] [2] In Afghanistan, however, it is standardized at 2,000 square metres (0.49 acres). [ 2 ] [ 3 ] The jerib was roughly equivalent to the other customary land measures in south Asia and the Middle East, the Indian bigha and the Sumerian iku , varying between 1,600 and 3,600 square metres (0.40 and 0.89 acres).
In Puerto Rico, a cuerda is a traditional unit of land area nearly equivalent to 3,930 square meters, [1] [2] or 4,700 square yards, 0.971 acre, or 0.393 hectare (ha). The precise conversion is 1 cuerda = 3,930.395625 m 2. [2] The term "Spanish acre" instead has been used sometimes by mainlanders. [1]