For instance, 20 **miles square** (20 × 20 **miles**) has an area equal to 400 **square miles**; a rectangle of 10 × 40 **miles** likewise has an area of 400 **square miles**, but it is not 20 **miles square**. **One square mile** is equal to: 4,014,489,600 **square** inches. 27,878,400 **square** feet.

Also, how many areas are in a square mile? So a 1-**mile** side is 5280 feet and there are 25.3 acres per **mile**, so each acre defined as a **square** is 208.7 feet per side (5280/25.3 = 208.7). Each “**square**” acre is 43,560 ft^2 (208.7^2), and there are 640 of them in a **square mile**, so a **square mile** contains 43,560 • 640 = 27,878,400 **square** feet (which is also 5280^2).

Secondly, how many football fields can fit in a square mile?

484 football fields

How many acres in a mile by a mile?

Square **mile** is an imperial and United States Customary area unit and defined as a square with all sides are one **mile** in length. There are 640 **acres** in 1 square **mile**. The symbol is mi².