In 1 square feet there are 0.0000229568 acres. Meanwhile in 1 acres there are 43,560 square feet. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Acres to Square feet calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert square feet to acres, use this fixed area conversion:
Conversion formula (sq ft to acres):
acres = square feet ÷ 43,560
Quick examples:
Tip: For land area conversions, keep 4 to 6 decimal places for small lots, and 2 to 4 for larger parcels.
One acre equals 43,560 square feet. This is the standard used in the US for land area.
Divide the number of square feet by 43,560.
Acres = square feet ÷ 43,560
Use this simple formula:
acres = ft² ÷ 43,560
10,000 ÷ 43,560 = 0.2296 acres (about 0.23 acres).
20,000 ÷ 43,560 = 0.4591 acres (about 0.46 acres).
30,000 ÷ 43,560 = 0.6887 acres (about 0.69 acres).
40,000 ÷ 43,560 = 0.9183 acres (about 0.92 acres).
43,560 square feet equals 1 acre. This is the exact match.
50,000 ÷ 43,560 = 1.1478 acres (about 1.15 acres).
100,000 ÷ 43,560 = 2.2957 acres (about 2.30 acres).
1,000 ÷ 43,560 = 0.0230 acres (about 0.02 acres).
1 ÷ 43,560 = 0.0000229568 acres.
That’s a very small part of an acre.
Yes. Acres can be any decimal value. For example, 0.5 acres is half an acre, which equals 21,780 square feet.
Multiply acres by 43,560.
Square feet = acres × 43,560
The acre comes from older land measures. Over time, it became fixed as 66 feet × 660 feet, which equals 43,560 square feet.
Not always. In the US, an acre is 43,560 square feet. Some places use other land units, but the US acre value stays the same.
0.25 × 43,560 = 10,890 square feet.
0.5 × 43,560 = 21,780 square feet.
2 × 43,560 = 87,120 square feet.
5 × 43,560 = 217,800 square feet.
Use a quick rule: 44,000 square feet is about 1 acre.
This gives a close estimate, but it’s not exact.
Rounding depends on your use. For listings and general planning, two decimal places often works. For surveys and permits, you may need more precision.
The Calculate Box tool to convert square feet to acres uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a square feet value in the box and have it instantly converted to acres.