Acres to Square Feet (sq ft) Converter
Enter a value to instantly convert between area units.
1 Acre = 43560 Square Foot
Key Formulas
Acre → Square Foot
ft² = ac × 43560Square Foot → Acre
ac = ft² × 0.0000229568Hectare → Acre
ac = ha × 2.47105Acre → Hectare
ha = ac × 0.404686Formula
ft² = ac × (4046.8564224 / 0.09290304)Multiply acres by 43,560 to get square feet. The factor follows from the definitions used here: an acre is 4,046.8564224 m², a square foot is 0.09290304 m², and the quotient is 43,560. Real estate listings quote lots in acres, while zoning codes and building plans use square feet, so a half-acre lot has 21,780 ft². The older US survey foot is 2 parts per million longer than the international foot, which matters for parcels recorded under that standard.
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
A one-acre lot, as a square-footage figure for a listing.
1 ac = 43560 ft²
A quarter-acre residential lot, listed in square feet.
0.25 ac = 10890 ft²
A 2.5-acre parcel quoted in square feet for a landscaping bid.
2.5 ac = 108900 ft²
A 130-acre farm tract in square feet for a site report.
130 ac = 5662800 ft²