Square Feet to Acres converter (ft² to ac)
Convert Square Feet (ft²) to Acres (ac) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Acres to Square Feet (ac to ft²) ►
How to convert Square Feet to Acres
1 acre is equal to 43,560 square feet (ft²).
ac = ft² ÷ 43,560
Multiply the square feet by 0.0000229568:
Example: Convert 43,560 ft² to acres:
ac = 43,560 × 0.0000229568 = 1 ac
What is a Square Feet?
The Square Feet (ft²) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Acres?
The Acres (ac) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts area from Square Feet into Acres. One ft² equals 2.295680e-5 ac.
Square Feet to Acres conversion table
Common ft² values and the matching ac result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Square Feet (ft²) | Acres (ac) |
|---|---|
| 1000 ft² | 0.0229568 ac |
| 5000 ft² | 0.114784 ac |
| 10000 ft² | 0.229568 ac |
| 43560 ft² | 0.999998208 ac |
| 100000 ft² | 2.29568 ac |
| 500000 ft² | 11.4784 ac |
How this calculator works
The form on this page is a Square Feet-to-Acres converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the ac result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many ac are in 1 ft²?
1 ft² = 2.295680e-5 ac.
How do I convert Square Feet to Acres?
Multiply the square feet by 0.0000229568:
Is this ft² to ac converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.