Acre
The
acre is a unit of area used in the imperial and U.S. customary systems. It is equivalent to 43,560 square feet. An acre is about 40% of a hectare or about 75% the size of an American football field. The acre is commonly used in the United States, Antigua and Barbuda American Samoa, The Bahamas, Belize, the British Virgin Islands, the Cayman Islands, Dominica, the Falkland Islands, Grenada, Guam, the Northern Mariana Islands, India, Jamaica, Montserrat, Myanmar, Pakistan, Samoa, St. Lucia, St. Helena, St. Kitts and Nevis, St. Vincent and the Grenadines, Turks and Caicos, and the US Virgin Islands. It is commonly used in the United Kingdom, Canada and Australia, although the metric system is used in legislation. The international symbol of the acre is
ac, and is defined as 1/640 of a square mile. The most commonly used acre today is the international acre. In the United States both the international acre and the slightly different US survey acre are in use. The most common use of the acre is to measure tracts of land. One international acre is defined as exactly 4046.8564224 square metres.