One acre equals how many square feet?

• A. 43,000 sq ft
• B. 43,560 sq ft
• C. 435,600 sq ft
• D. 4,356 sq ft

Answer: (B)

An acre is a unit of area and its exact size in square feet is 43,560. A handy way to see this is to think of an acre as a rectangle 66 feet by 660 feet (a chain by a furlong). Multiplying 66 by 660 gives 43,560 square feet. You can also relate it to square yards or square rods: 1 acre equals 4,840 square yards or 160 square rods, and 1 square rod is 16.5 feet on each side, which also leads to 43,560 square feet. The other numbers are nearby but not exact—43,000 is a rough estimate, 4,356 is one-tenth of an acre, and 435,600 is ten acres.