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Convert Acre to Square Mile

Acre (ac)
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Square Mile (mi²)

Acre

The acre is a unit of area commonly used in the imperial system and the U.S. customary system. It is used primarily for measuring large areas of land, particularly in agriculture, real estate, and forestry. One acre is defined as 43,560 square feet or 4,840 square yards, which is approximately 4,047 square meters or 0.4047 hectares.

Origin:

The acre has its origins in medieval England, where it was used as a unit of area for measuring land, particularly for agricultural purposes. The term "acre" comes from the Old English word "aecer", which referred to a field or a piece of land. The unit was historically defined as the area that could be plowed in one day by a team of oxen. The standard definition of an acre as 43,560 square feet was established in the 18th century, and it has been widely adopted in countries that use the imperial or U.S. customary systems. Despite the global adoption of the metric system, the acre remains a standard unit for land measurement in the United States and other regions that follow imperial units.

Square Mile

A square mile (mi²) is a unit of area commonly used in the imperial system and the U.S. customary system. It is defined as the area of a square with sides that are each 1 mile long. One square mile is equal to 640 acres or 2.589 square kilometers, which is approximately 2,589,988 square meters.

Origin:

The square mile has its origins in the mile, which was derived from the Roman mille passus (meaning "a thousand paces"). The mile was standardized over time and was originally used for measuring long distances, especially for travel and trade. The concept of the square mile, as a unit of area, developed as a way to quantify larger land areas, especially in countries using the imperial system. The square mile has been widely used in the United States, the United Kingdom, and other countries that still follow the imperial system for measuring large areas such as land, real estate, and geographical regions. Despite the global trend toward metric units, the square mile remains an important unit for land measurement in these regions.

Convert Acre to other area-converter units

1 Acre = 4046.8564224 Square Meter

1 Acre = 0.0040468564 Square Kilometer

1 Acre = 40468564.224 Square Centimeter

1 Acre = 4046856422.4 Square Millimeter

1 Acre = 4.046856422e+21 Square Nanometer

1 Acre = 4046856422399924 Square Micrometer

1 Acre = Hectare

1 Acre = Acre

1 Acre = 0.0015625 Square Mile

1 Acre = 4840 Square Yard

1 Acre = 43560 Square Feet

1 Acre = 6272640 Square Inch