How many square feet are in an acre?
There are 43,560 square feet in one acre. A half acre is 21,780 square feet and a quarter acre is 10,890 square feet.
Exact: 1 acre = 43,560 square feet. Type any acreage to see its square feet.
Square feet in common fractions of an acre
| Acres | Square feet |
|---|---|
| 1/8 acre (0.125) | 5,445 |
| 1/5 acre (0.2) | 8,712 |
| 1/4 acre (0.25) | 10,890 |
| 1/3 acre (0.333) | 14,520 |
| 1/2 acre (0.5) | 21,780 |
| 3/4 acre (0.75) | 32,670 |
| 1 acre | 43,560 |
| 1.5 acres | 65,340 |
| 2 acres | 87,120 |
| 3 acres | 130,680 |
| 5 acres | 217,800 |
| 10 acres | 435,600 |
The dimensions of an acre in feet
An acre is an amount of area, so many shapes equal one acre.
| Shape | Dimensions in feet |
|---|---|
| Square | about 208.71 by 208.71 |
| The original acre (one furlong by one chain) | 660 by 66 |
| A deep lot | 100 by 435.6 |
| A wide lot | 150 by 290.4 |
| A double-wide lot | 200 by 217.8 |
Why an acre is 43,560 square feet
The acre comes from English farming. It was defined as a strip one furlong long and one chain wide. A furlong is 660 feet and a chain is 66 feet. Multiply them and you get 43,560 square feet.
Square feet matter when land becomes lots
Zoning ordinances state minimum lot sizes in square feet, and land sells by the acre. The conversion is the first step in asking how many lots a tract could hold. Streets, open space, and stormwater areas take their share before any lot is drawn. See the lots per acre calculator.
Questions
How many square feet is 1 acre?
One acre is exactly 43,560 square feet.
How many square feet is a half acre?
A half acre is 21,780 square feet.
How many square feet is a quarter acre?
A quarter acre is 10,890 square feet.
How many feet by feet is an acre?
An acre as a square is about 208.71 feet on each side. Other shapes with the same area are also one acre.
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