Acres to Square Feet
Type acres (ac), see square feet (ft²).
By Akash Yadav Updated 27 September 2026
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The formula
How to convert acres to square feet
To change acres into square feet, multiply by 43560.
square feet = acres × 43560
Going the other way: acres = square feet ÷ 43560
1 acre = 43560 square feet. This factor is the exact definition of the unit, not a rounded estimate.
Worked example
You have 0.25 acres. Multiply by 43560. 0.25 × 43560 = 10,890 ft².
Common values
Acres to square feet conversion table
| Acres (ac) | Square feet (ft²) |
|---|---|
| 0.1 ac | 4356 ft² |
| 0.125 ac | 5445 ft² |
| 0.2 ac | 8712 ft² |
| 0.25 ac | 10,890 ft² |
| 0.33 ac | 14,374.8 ft² |
| 0.5 ac | 21,780 ft² |
| 0.75 ac | 32,670 ft² |
| 1 ac | 43,560 ft² |
| 1.5 ac | 65,340 ft² |
| 2 ac | 87,120 ft² |
| 2.5 ac | 108,900 ft² |
| 3 ac | 130,680 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 40 ac | 1,742,400 ft² |
Before you rely on it
An acre has no fixed shape
An acre is exactly 43,560 square feet — an area, not a shape. A square acre is about 208.7 ft on each side, but a long strip 66 ft by 660 ft is exactly one acre too, and that strip is where the unit came from.
This page uses the international acre, based on the 1959 foot. Older US land records use the US survey acre, about 4 parts per million bigger: roughly 0.17 ft² more per acre, which only matters on large surveys.
US residential lots are often listed in fractions of an acre. A quarter-acre lot is 10,890 ft², and the house, driveway and yard all come out of that figure.
An American football field including both end zones is 360 ft by 160 ft, 57,600 ft² — about 1.32 acres. It is a handy picture, but it overstates an acre by about a third.
Common questions
Frequently asked questions
How many square feet are in an acre?
1 acre is exactly 43,560 square feet.
How many square feet is half an acre?
Half an acre is exactly 21,780 square feet.
How many square feet is a quarter acre?
A quarter acre is exactly 10,890 square feet.
How many square feet is 2 acres?
2 acres is exactly 87,120 square feet.
How big is an acre in feet?
As a square, about 208.7 ft on each side. Any shape with an area of 43,560 ft² is an acre.
How many square meters is an acre?
1 acre is exactly 4046.8564224 m², about 4047 m².
Keep going
Related converters
- Square Feet to Acres ft² → ac
- Acres to Hectares ac → ha
- Square Feet to Square Meters ft² → m²
- All area converters
Every factor on this page is listed in our conversion methodology.