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As the name suggests, an acre-foot is defined as the volume of one acre of surface area to a depth of one foot.. Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3).
I have also calculated an exact cubic-metre conversion which I've added into the article. So we have the following conversions. 1 international acre foot ≡ 43,560 international cubic feet = 1233.48183754752 m 3 (exactly) = 325,851 + 3 ⁄ 7 US gallons (exactly) ≈ 271,328.072596 imp gal. I have also added a definition for the US survey ...
Converts measurements to other units. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Value 1 The value to convert. Number required From unit 2 The unit for the provided value. Suggested values km2 m2 cm2 mm2 ha sqmi acre sqyd sqft sqin km m cm mm mi yd ft in kg g mg lb oz m/s km/h mph K C F m3 cm3 mm3 L mL cuft ...
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).
cubic feet = 3 379 200 acre-feet = 4.168 181 825 440 579 584 cubic kilometres: ≈ 916 871 822 916 imperial gallons: ≈ 1 101 117 140 000 US liquid gallons ≈ 114 608 977 865 imperial bushels: ≈ 118 282 962 000 US bushels ≈ 26 217 074 762 crude barrels
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In England an acre was 4,840 square yards (4,050 m 2), in Scotland 6,150 square yards (5,140 m 2) and in Ireland 7,840 square yards (6,560 m 2). It is a Saxon unit, meaning "field". Bovate, Oxgang: 6 ha: The area that one ox can plough in a single year. Approximately 15 acres or one eighth of a carucate. Virgate: 12 ha
In 1824, these units were replaced with a single system based on the imperial gallon. [a] Originally defined as the volume of 10 pounds (4.54 kg) of distilled water (under certain conditions), [b] then redefined by the Weights and Measures Act 1985 to be exactly 4.546 09 L (277.4 cu in), the imperial gallon is close in size to the old ale gallon.