How many acres are there in one square mile?

One square mile is equivalent to 640 acres. This measurement is a standard calculation based on the fact that a square mile is defined as a square with each side measuring one mile. Since one mile equals 5,280 feet, when calculating the area, you multiply the length and width (5,280 feet x 5,280 feet). This results in an area of 27,878,400 square feet.

To convert square feet to acres, it is important to know that one acre consists of 43,560 square feet. When you divide 27,878,400 square feet by 43,560 square feet per acre, the result is 640 acres. This is why the answer of 640 acres is correct, as it is a fundamental conversion that is widely used in real estate and land management.