How many square feet are in an acre?

How many square feet are in an acre?

• A. 43,560
• B. 45,500
• C. 37,870
• D. 39,560

Answer: (A)

An acre is a specific land area that converts to a fixed number of square feet, which is 43,560. You can see this by thinking in smaller units: one acre equals 160 square rods, and a rod is 16.5 feet long, so the area of one square rod is 16.5 × 16.5 = 272.25 square feet; 160 of these gives 43,560 square feet. Another way: an acre is 4,840 square yards, and one square yard is 9 square feet, so 4,840 × 9 = 43,560. Therefore, 43,560 square feet are in an acre. The other numbers don’t match this standard conversion.

An acre is a specific land area that converts to a fixed number of square feet, which is 43,560. You can see this by thinking in smaller units: one acre equals 160 square rods, and a rod is 16.5 feet long, so the area of one square rod is 16.5 × 16.5 = 272.25 square feet; 160 of these gives 43,560 square feet. Another way: an acre is 4,840 square yards, and one square yard is 9 square feet, so 4,840 × 9 = 43,560. Therefore, 43,560 square feet are in an acre. The other numbers don’t match this standard conversion.