Square Feet to Acres Converter
1 square foot ≈ 0.0000229568411 acres
1 square foot equals 0.0000229568 acres
How to convert square feet to acres
Area factors are squared length factors: 1 ft² = (0.3048 m)². The acre here uses international feet; historic US survey acres differ slightly.
ac = ft² × 0.00002295684114One square foot is 0.00002295684114 acres, so a single multiplication converts any value.
0.000229568 ac ≈ 10 × 0.00002295684114Square feet to acres conversion table
Common values in square feet, converted to acres.
| Square feet (ft²) | Acres (ac) |
|---|---|
| 1 | 0.000022956841 |
| 2 | 0.000045913682 |
| 3 | 0.000068870523 |
| 4 | 0.000091827365 |
| 5 | 0.00011478421 |
| 10 | 0.00022956841 |
| 20 | 0.00045913682 |
| 25 | 0.00057392103 |
| 50 | 0.0011478421 |
| 100 | 0.0022956841 |
| 250 | 0.0057392103 |
| 500 | 0.011478421 |
| 1,000 | 0.022956841 |
About these units
square footft²
The area of a square one foot on each side. The standard unit for US floor area.
acreac
Exactly 4,840 square yards, or 43,560 square feet. The customary land unit.
Reference: Derived from the international yard (1959).
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.