Convert square feet to acres
Square foot (ft²) to acre (ac). One square foot equals 0.000023 acres.
Formula
Square foot to acre conversion table
| Square feet | Acres | Acres | Square feet |
|---|---|---|---|
| 1 ft² | 0.000023 ac | 1 ac | 43560 ft² |
| 2 ft² | 0.000046 ac | 2 ac | 87120 ft² |
| 3 ft² | 0.000069 ac | 3 ac | 130680 ft² |
| 5 ft² | 0.000115 ac | 5 ac | 217800 ft² |
| 10 ft² | 0.00023 ac | 10 ac | 435600 ft² |
| 20 ft² | 0.000459 ac | 20 ac | 871200 ft² |
| 50 ft² | 0.001148 ac | 50 ac | 2178000 ft² |
| 100 ft² | 0.002296 ac | 100 ac | 4356000 ft² |
| 500 ft² | 0.011478 ac | 500 ac | 21780000 ft² |
| 1000 ft² | 0.022957 ac | 1000 ac | 43560000 ft² |
To convert square feet to acres, divide the number of square feet by 43560. One square foot equals 0.000023 acres, and one acre equals 43560 square feet, so the relationship is fixed and exact. As a worked example, 10 ft² comes to 0.00023 ac. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a area conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common square foot values already worked out in acres, plus the reverse acre to square foot direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many acres are in a square foot?
One square foot equals 0.000023 acres. The ratio is constant, so you can multiply any number of square feet by 0.000023 to get acres.
What is the formula to convert square feet to acres?
Use acres = square feet ÷ 43560. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert acres back to square feet?
Go the other way by using one acre equals 43560 square feet. You can also press the swap button in the converter above to flip the direction in one click.
Is this square foot to acre converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.