Convert square mile to acre
Please provide values below to convert square mile [mi^2] to acre [ac], or Convert acre to square mile.
How to Convert Square Mile to Acre
1 mi^2 = 640 ac
Example: convert 15 mi^2 to ac:
15 mi^2 = 15 × 640 ac = 9600 ac
Square Mile to Acre Conversion Table
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Square Mile
A square mile is a unit of area measurement equal to the area of a square with sides of one mile each.
History/Origin
The square mile has been used historically in the United States and the United Kingdom for land measurement, especially in surveying and real estate, originating from the imperial system of units.
Current Use
Today, the square mile is primarily used in the United States and the UK for measuring land areas, such as in real estate, geography, and environmental studies, within the context of the 'Area' converter in 'Common Converters'.
Acre
An acre is a unit of area commonly used in the United States and the UK, equal to 43,560 square feet or approximately 4,047 square meters.
History/Origin
The acre originated in medieval England as a measure of land area that could be plowed in one day with a yoke of oxen. It was standardized in the 19th century and has since been used primarily for measuring land, especially in agriculture.
Current Use
Today, the acre is primarily used in real estate, agriculture, and land planning in the United States, the UK, and other countries that use imperial or customary units.