Exact factor: 1 acre = 43,560 square feet.
The formula
Square feet = acres × 43,560.
Quick reference
| Acres | Square feet |
|---|---|
| 0.25 | 10,890 |
| 0.5 | 21,780 |
| 1 | 43,560 |
| 2 | 87,120 |
| 5 | 217,800 |
| 10 | 435,600 |
| 40 | 1,742,400 |
| 100 | 4,356,000 |
Why the number is 43,560
An acre began as the area a team of oxen could plow in a day: a strip one furlong long and one chain wide. A furlong is 660 feet and a chain is 66 feet, and 660 times 66 is 43,560.
For lots and land
Lot sizes in zoning ordinances are usually written in square feet, and land is usually sold by the acre. Converting between them is the first step in seeing how many lots a tract might hold. See the lots per acre calculator.
Questions
How many square feet is an acre?
One acre is exactly 43,560 square feet.
How many square feet is half an acre?
Half an acre is 21,780 square feet.
How many square feet is a quarter acre?
A quarter acre is 10,890 square feet.
Tell us what the project needs
Load, acreage, counties, and timeline. We reply with how we would run the search and where we would start.