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The entire yellow square is one square mile; the dark blue area at right represents 100 acres. The acre ( / ˈeɪkər / AY-kər) 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 ...
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 meters (10,000 m 2), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectares and one hectare contains about ...
1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres Other uncommon metric units of area include the tetrad , the hectad , and the myriad . The acre is also commonly used to measure land areas, where
The square metre ( international spelling as used by the International Bureau of Weights and Measures) or square meter ( American spelling) is the unit of area in the International System of Units (SI) with symbol m2. [ 1] It is the area of a square with sides one metre in length. Adding and subtracting SI prefixes creates multiples and ...
The square kilometre ( square kilometer in American spelling; symbol: km2) is a multiple of the square metre, the SI unit of area or surface area . 1 km 2 is equal to: 1,000,000 square metres (m 2) 100 hectares (ha) It is also approximately equal to: 0.3861 square miles [ 2] 247.1 acres [ 3] Conversely:
The acre-foot is a non- SI unit of volume equal to about 1,233 m 3 commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, irrigation water, [ 1] and river flows . An acre-foot equals approximately an eight-lane swimming pool, 82 ft (25 m) long, 52 ft (16 m ...
The tarang wa (square wa, tarang meaning 'grid') is derived from the area of a square with sides of 1 wa (the Thai fathom ). One ngan is equal to 100 square wa, and one rai ('field' or 'plantation') equals 4 ngan or 1 square sen. [1] The units were standardized in square metres when Thailand (then Siam) adopted the metric system in 1923, [2] [3 ...
1 feddan = 24 kirat = 60 metre × 70 metre = 4200 [2] square metres (m²) = 0.420 hectares = 1.037 acres [3] In Syria, the feddan is a vaguer quantity, referring to the amount of land that can be ploughed by a pair of oxen in a year, being about 5–12 ha (12–30 acres). [4]