How many square miles are in 1 acres?

1 acres (ac) is exactly 0.001563 square miles (mi²).

How do I convert acres to square miles?

Multiply the value in acres by 0.001563 to get the result in square miles. Or use the converter above — type any number and see the result instantly.

Acres (ac) to Square miles (mi²) Conversion

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Acres

The acre is a unit of area equal to exactly 4,046.8564224 square metres, the standard unit for land measurement in the United States and United Kingdom. Its origin lies in medieval English agriculture: an acre was the amount of land a yoke of oxen could plough in a single day, standardised as a furlong (220 yards) long and a chain (22 yards) wide — exactly 43,560 square feet. One square mile contains exactly 640 acres.

Square miles

The square mile is a unit of area equal to exactly 2,589,988.110336 square metres (approximately 2.59 km²). It is the standard unit for measuring large land areas, population density, and political jurisdictions in the United States and United Kingdom. One square mile contains exactly 640 acres — the basis of the US Public Land Survey System that structured much of North American land division.

Acres (ac) to Square miles (mi²) - Conversion Table
Acres (ac)	Square miles (mi²)
0.1 ac	0.00015625 mi²
1 ac	0.0015625 mi²
2 ac	0.003125 mi²
3 ac	0.0046875 mi²
5 ac	0.0078125 mi²
10 ac	0.015625 mi²
20 ac	0.03125 mi²
30 ac	0.046875 mi²
50 ac	0.078125 mi²
100 ac	0.15625 mi²
1000 ac	1.5625 mi²

Convert Acres (ac) to other units of Area

List of Conversions
‣ Acres (ac) to square meters (m²)
‣ Acres (ac) to square kilometers (km²)
‣ Acres (ac) to square centimeters (cm²)
‣ Acres (ac) to square millimeters (mm²)
‣ Acres (ac) to square feet (ft²)
‣ Acres (ac) to square inches (in²)
‣ Acres (ac) to square yards (yd²)
‣ Acres (ac) to square miles (mi²)
‣ Acres (ac) to hectares (ha)