how many miles is an acre
Multiply the number of acres by 0.0015625{\displaystyle 0.0015625}. This decimal is a way of representing the ratio of square miles to acres, or 1640{\displaystyle {\frac {1}{640}}}, since, for every 1 square mile you have, you have 640 acres. To put it another way, each acre is 0.0015625 of a mile.