**Acres to square miles** conversion factor is 0.0015625. To find out how many square miles in acres, multiply the acre value by the conversion factor or use the converter.

**1 Acre = 0.0015625 Square Miles**

For example, to find out how many square miles there are in 1000 acres, multiply the acre value by the conversion factor, 1000 ac * 0.0015625 = 1.5625 sq. miles in 1000 acres.

**Acre** is an imperial and US customary systems area unit. 1 acre equals to 0.0015625 sq. mile, 0.00404686 sq. kilometer and 43560 sq. feet. The abbreviation is "**ac**".

**Square mile** is an imperial and US customary area unit and equals to 640 acres, 259 hectares and 2.59 sq. kilometers. The abbreviation is "**mi**^{2}".