Square Feet to Acres
Convert square feet (ft²) to acres (ac) instantly — with formula and reference table.
ft²
ac
Quick answer: 1 ft² = 0.000023 ac. To convert square feet to acres, multiply by ft² × 0.000023.
Converting square feet to acres
This converter changes a value in square feet (ft²) into acres (ac). One square feet equals 0.000023 ac. One acre equals 43,560 square feet, so converting square feet to acres means dividing by 43,560. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
ac = ft² × 0.000023
Example
Convert 10 ft² to ac: 10 × 0.000023 = 0.00023 ac.
Square Feet to Acres conversion table
| Square Feet (ft²) | Acres (ac) |
|---|---|
| 1 ft² | 0.000023 ac |
| 2 ft² | 0.000046 ac |
| 3 ft² | 0.000069 ac |
| 5 ft² | 0.000115 ac |
| 10 ft² | 0.00023 ac |
| 20 ft² | 0.000459 ac |
| 25 ft² | 0.000574 ac |
| 50 ft² | 0.001148 ac |
| 100 ft² | 0.002296 ac |
How to use this converter
- Enter a value in the square feet (ft²) field.
- Read the converted value in acres (ac) below.
- Type into the ac field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many acres is 43,560 square feet?
43,560 square feet equals exactly 1 acre.
How do I convert 10,000 sq ft to acres?
10,000 divided by 43,560 = 0.23 acres.
How many square feet in a quarter acre?
A quarter acre is 10,890 square feet.