Square feet to Acres converter

To convert square feet to acres, enter the value in the first field. The result in acres is calculated automatically using the exact conversion factor.

1 ft² ≈ 0.0000229568411387 ac
1 ac = 43560 ft²

Formula: ac ≈ ft² × 0.0000229568411387
ft² = ac × 43560

Definitions: 1 ft² = 144 in²; 1 ac = 43560 ft²

The square foot (ft²) is 144 square inches. It is the standard unit for home and office floor space in the United States and is also common in property listings in the United Kingdom, Canada and India.

The acre (ac) is 43,560 square feet, about 4,047 square meters or 0.4047 hectares. It is used for land area in the United States and, informally, in the United Kingdom and Canada, and traditionally it was the area a team of oxen could plow in a day.

See the conversion table with commonly used values, handy for quick reference or study.