Divide square feet by 43,560 to get acres. Lot sizes on property listings are often given in square feet; zoning rules may use acres.
How to use the Square Feet to Acres Converter
- Type the number of square feet into the Square feet field. Decimals such as 5,000 are fine.
- Read the answer in Acres – it updates as you type, with no button to press.
- To convert the other way, type into Acres and the square feet are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only ft² ⇄ acre. Need a different unit? Use the general area converter, where you can choose any “from” and “to” unit.
How it works
Both units measure area, so they are always in the same ratio: one square foot equals 2.295684 × 10^-5 acres. The calculator multiplies the number of square feet you type by 2.295684 × 10^-5 to give acres, and when you type into the acres field it divides by the same factor to give square feet. Because the ratio never changes, doubling the square feet always doubles the acres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert square feet to acres
- Write down the value in square feet, for example 10,000 ft².
- Multiply by the conversion factor 2.295684 × 10-5 (because 1 square foot = 2.295684 × 10-5 acre).
- 10,000 × 2.295684 × 10-5 = 0.22956841 acre.
- To go back from acres to square feet, divide by 2.295684 × 10-5 – or multiply by 43,560.
ft² to acre conversion table
| Square feet | Acres | Acres | Square feet |
|---|---|---|---|
| 1,000 ft² | 0.022956841 acre | 1 acre | 43,560 ft² |
| 2,500 ft² | 0.057392103 acre | 2 acre | 87,120 ft² |
| 5,000 ft² | 0.11478421 acre | 5 acre | 217,800 ft² |
| 7,500 ft² | 0.17217631 acre | 10 acre | 435,600 ft² |
| 10,000 ft² | 0.22956841 acre | 20 acre | 871,200 ft² |
| 21,780 ft² | 0.5 acre | 50 acre | 2,178,000 ft² |
| 43,560 ft² | 1 acre | 100 acre | 4,356,000 ft² |
| 100,000 ft² | 2.2956841 acre | 1,000 acre | 43,560,000 ft² |
What is a square foot?
The square foot is a square 1 ft on each side, exactly 0.09290304 m². U.S., Canadian, UK and South Asian property listings quote floor space in square feet.
What is an acre?
An acre is exactly 43,560 square feet, about 4,047 m². Historically it was the land a team of oxen could plough in a day. It remains the land unit in the U.S. and UK.
Quick mental conversion
For a fast estimate, multiply square feet by about 2.3 × 10-5 to get acres; the error is about 0.2%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Converting area with a length factor (1 m = 3.28 ft, but 1 m² = 10.76 ft², not 3.28 ft²), and assuming regional land units such as marla, bigha or katha have one standard size everywhere.
Formula
1 ft² = 2.295684 × 10^-5 acre1 acre = 43,560 ft²acre = ft² × 2.295684 × 10^-5Worked example
Inputs — Square feet: 10,000 ft².
Results — Acres = 0.22956841 acre.
Frequently asked questions
How many acres is 10,000 ft²?
About 0.2296 acres.
How many square feet in an acre?
43,560.
How do I convert square feet to acres?
Multiply the number of square feet by 2.295684 × 10^-5. For example, 10,000 ft² × 2.295684 × 10^-5 = 0.22956841 acre.
How do I convert acres back to square feet?
Divide by 2.295684 × 10^-5 (or multiply by 43,560), or simply type the value into the acres field above.
What is 1,000 ft² in acres?
1,000 ft² = 0.022956841 acre.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between square feet and acres. To pick any area unit, use the general area converter linked under Related calculators.
What formula does the Square Feet to Acres Converter use?
1 ft² = 2.295684 × 10^-5 acre.