How many square feet are in an acre?

One acre is exactly 43,560 square feet, so to convert square feet to acres you divide by 43,560.

What is half an acre in square feet?

Half an acre is 21,780 square feet (43,560 ÷ 2). The converter shows any value as you type.

No. The conversion runs entirely in your browser, with no network requests.

Convert square feet to acres and back.

An acre is defined as exactly 43,560 square feet. To convert square feet to acres, divide by 43,560; to go the other way, multiply by 43,560.

Enter a value in either box — square feet or acres — and the converter fills in the other side instantly, all in your browser.