Convert Square Miles (mi²) to Acres (ac)

Enter a value below to convert Square Miles (mi²) to Acres (ac).

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Conversion:

1 Square Miles (mi²) = 640 Acres (ac)

How to Convert Square Miles (mi²) to Acres (ac)

1 mi2 = 640 ac

1 ac = 0.0015625 mi2

Example: convert 15 Square Miles (mi²) to Acres (ac):

25 mi2 = 16000 ac

Square Miles (mi²) to Acres (ac) Conversion Table

Square Miles (mi²)Acres (ac)
0.01 mi26.4 ac
0.1 mi264 ac
1 mi2640 ac
2 mi21280 ac
3 mi21920 ac
5 mi23200 ac
10 mi26400 ac
20 mi212800 ac
50 mi232000 ac
100 mi264000 ac
1000 mi2640000 ac

Square Miles (mi²)

Definition

A square mile (mi²) is an imperial unit of area equal to the area of a square with sides of 1 mile. It equals 640 acres or approximately 2.59 square kilometers.

History

The square mile has been used since the establishment of the statute mile in England. As settlements expanded, the square mile became the standard for measuring large tracts of land, counties, and states.

Current use

Square miles are used primarily in the United States and the United Kingdom to express the area of cities, counties, states, and natural parks. Population density is often stated in people per square mile.

Acres (ac)

Definition

An acre (ac) is an imperial unit of area equal to 43,560 square feet, 4,840 square yards, or approximately 4,046.86 square meters (about 0.4047 hectares).

History

The acre originated in medieval England as the amount of land a yoke of oxen could plow in one day. It was later standardized and remains one of the most recognizable land measurement units in English-speaking countries.

Current use

Acres are widely used for measuring land in the United States, the United Kingdom, Canada, and other countries with historical ties to the British imperial system. Real estate, farming, and forestry commonly reference acres.