Square Feet to Acres Converter

How to convert square feet to acres

1 square foot = 0.0000229568 acres. To convert square feet to acres, divide by 43,560 (or multiply by 0.0000229568). A square foot is a 1 ft × 1 ft square, exactly 0.09290304 m². An acre is 43,560 square feet, about 4,046.86 m².

Worked examples

• 5,000 square feet = 0.114784 ac (5,000 ÷ 43,560)
• 10,890 square feet = 0.25 ac (10,890 ÷ 43,560)
• 43,560 square feet = 1 ac (43,560 ÷ 43,560)

Where this conversion comes up

Square feet are used for home and apartment sizes, flooring and paint coverage in the US; acres for land, farm and lot sizes in the US and UK. An acre is 43,560 ft², so a 10,000 ft² lot is 0.23 acre and a quarter-acre lot is 10,890 ft². Zoning minimums and listings often mix the two.

Quick estimate

Divide by 43,560, or by 44,000 and add 1%.

Common mistakes

• Multiplying instead of dividing. A acre is larger than a square foot, so the number of acres must come out smaller: 5,000 square feet = 0.114784 ac.
• Rounding too early. Keep the full factor until the last step; rounding 0.000023 to 0.00002 first puts large values noticeably off.

Going the other way? Use the acres to square feet converter. Related area converters: hectares to acres, acres to hectares, square feet to square meters, square meters to square feet, square inches to square feet, square feet to square yards.