how many' miles in an acre
To find the square miles in one acre, use this formula: 1 acres*1 miÂ². 640 acres=0.0015625 miÂ². There are 0.0015625 miÂ² in one acre.
1 square mile = 640 acres so 640 x 100 = 64,000 acres in 100 square miles   there are actually several acre measurements around the world but the one above is for the standâ¦ard US survey acre, also the British acre, which is defined as 220 yards x 22 yards (1 furlong x 1 chain), or 4840 sq yards, 640 to the square mile. So we agree at least.