One square mile equals how many acres?

One square mile equals how many acres?

• A. 320 acres
• B. 5280 acres
• C. 640 acres
• D. 1280 acres

Answer: (C)

Understanding how square miles convert to acres helps with real-world area comparisons. A square mile is a square with sides of one mile. Since 1 mile equals 5,280 feet, a square mile equals 5,280 feet by 5,280 feet, which is 27,878,400 square feet. An acre is defined as 43,560 square feet. To find how many acres are in a square mile, divide the total square feet by the square feet per acre: 27,878,400 ÷ 43,560 = 640. So, one square mile equals 640 acres. This also checks out because 640 acres × 43,560 ft²/acre = 27,878,400 ft², the area of a square mile.

Understanding how square miles convert to acres helps with real-world area comparisons. A square mile is a square with sides of one mile. Since 1 mile equals 5,280 feet, a square mile equals 5,280 feet by 5,280 feet, which is 27,878,400 square feet. An acre is defined as 43,560 square feet. To find how many acres are in a square mile, divide the total square feet by the square feet per acre: 27,878,400 ÷ 43,560 = 640. So, one square mile equals 640 acres. This also checks out because 640 acres × 43,560 ft²/acre = 27,878,400 ft², the area of a square mile.