Square Feet to Acres Converter
Convert square feet (sq ft) to acres (ac), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 sq ft = 2.29568411387e-5 ac
- 1 × 2.29568411387e-5 = 2.29568411387e-5 ac
How to convert square feet to acres
1 ac = 43,560 sq ft, so divide by 43,560 to go from square feet to acres (1 sq ft = 2.29568411387 × 10⁻⁵ ac).
ac = sq ft ÷ 43,560 sq ft = ac × 43,560
Worked example:
1 sq ft = 2.29568411387e-5 ac 5 × 2.29568411387e-5 = 0.000114784205693 ac
Square Feet to acres table
| Square Feet | Acres |
|---|---|
| 1 sq ft | 2.29568411387 × 10⁻⁵ ac |
| 2 sq ft | 4.59136822773 × 10⁻⁵ ac |
| 3 sq ft | 6.8870523416 × 10⁻⁵ ac |
| 4 sq ft | 9.18273645546 × 10⁻⁵ ac |
| 5 sq ft | 0.000114784205693 ac |
| 6 sq ft | 0.000137741046832 ac |
| 7 sq ft | 0.000160697887971 ac |
| 8 sq ft | 0.000183654729109 ac |
| 9 sq ft | 0.000206611570248 ac |
| 10 sq ft | 0.000229568411387 ac |
| 15 sq ft | 0.00034435261708 ac |
| 20 sq ft | 0.000459136822773 ac |
| 25 sq ft | 0.000573921028466 ac |
| 30 sq ft | 0.00068870523416 ac |
| 40 sq ft | 0.000918273645546 ac |
| 50 sq ft | 0.00114784205693 ac |
| 75 sq ft | 0.0017217630854 ac |
| 100 sq ft | 0.00229568411387 ac |
| 250 sq ft | 0.00573921028466 ac |
| 500 sq ft | 0.0114784205693 ac |
| 1000 sq ft | 0.0229568411387 ac |
About the units
- Square Feet (sq ft)
- Square feet, a US customary unit. Definition: NIST Handbook 44 Appendix C (derived from the international foot).
- Acres (ac)
- Acres, a US customary unit. Definition: NIST Handbook 44 Appendix C (1 acre = 43,560 sq ft, international-foot based).