Acres to Square feet Converter
Type a value in acres to get it in square feet, and see the reverse conversion.
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Acres to Square feet Converter by TheCalcTools
How the Acres to Square feet Converter works
An acre is exactly 43,560 square feet (one furlong by one chain). Land is sold by the acre in the US and UK; a football field without end zones is about 1.1 acres.
To convert acres to square feet, multiply by 43560. The calculator shows the result to 6 significant figures; the conversion factor itself is exact by definition.
Quick estimate in your head: an acre is roughly 209 × 209 feet.
The formula
Worked example
Using the default values shown in the calculator:
| Value in acres (ac) | 1 |
|---|
- 1 ac × 43560 = 43560 ft².
Result:
| Square feet (ft²) | 43560 |
|---|---|
| 1 ac in ft² | 43560 |
| Your number read as ft², in ac | 0.0000229568 |
| Square metres (m²) | 4046.86 |
| Square yards (yd²) | 4840 |
Conversion table
| ac | ft² |
|---|---|
| 0.1 ac | 4,356 ft² |
| 0.25 ac | 10,890 ft² |
| 0.5 ac | 21,780 ft² |
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 40 ac | 1,742,400 ft² |
| 100 ac | 4,356,000 ft² |
Frequently asked questions
What is 1 acre in square feet?
1 acre (ac) equals 43,560 ft².
How many square feet is half an acre?
21,780 sq ft.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.