An acre is a
unit of area equal to 4840 square yards. The acre is a unit of area
in a number of different systems, including the imperial and U.S.
customary systems. The most commonly used acres today are the international
acre and, in the United States, the survey acre.
One U.S. survey acre is equal to 62,726,400,000 / 15,499,969
m2 = 4046.8726098 m2.
One international acre is equal 4046.8564224 m2.
One acre comprises 4,840 square yards
or 43,560 square feet (which can be easily remembered as
44,000 square feet, less 1%). 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. 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. An acre is approximately
40% of a hectare.One acre is 90.75 yards of a 53.33 yard wide American
football field. The full field, including the end zones, covers
approximately 1.32 acres.