Square feet to Acres Converter
Convert square feet to acres instantly. Exact factor: 1 ft² = 0.000023 acres.
Free toolNo signupFormula shown
Convert square feet to acres
The exact conversion factor is 1 ft² = 0.000023 acres. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the square feet value by 43,560 (that is, 1 ÷ 0.000023) to get acres.
Worked example
- Take 1 ft²
- multiply by 43,560
- the result is 0.000023 acres
How to use it
- Enter your square feet
- Read the acres result
- Check the factor line to verify by hand
Frequently asked questions
How many acres are in one square feet?
Exactly 0.000023 acres, by the SI/NIST definition.
How do I convert acres back to square feet?
Divide by 0.000023 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.