How to use this converter
Enter a value in square feet to calculate acres. Results update as you type. You can swap the direction and choose the displayed precision.
Conversion formula
value × 0.0000229568411387 = result
Here the starting unit is Square feet (ft²) and the result is in Acres (ac). The calculator uses the catalog’s full factors before rounding the displayed result.
Worked examples
- 1 ft² ≈ 0.00002296 ac
- 10 ft² ≈ 0.00022957 ac
- 100 ft² ≈ 0.00229568 ac
Available area options
Square meters (m²) · Square feet (ft²) · Square kilometers (km²) · Acres (ac) · Hectares (ha) · Square miles (mi²) · Square inches (in²) · Square centimeters (cm²) · Square millimeters (mm²) · Square yards (yd²) · Ares (a) · Barns (b)
Frequently asked questions
Why can displayed results differ slightly?
Numeric results are rounded for display. Increase the precision setting to see more digits. Different unit conventions can also produce different results; check the complete unit label.
Can I convert in the opposite direction?
Use the swap control to reverse the selected units or bases.
Related tools
All area units · Browse all converters · acres to square feet