Acres to Square Feet Converter
Type a value in acres to see it in square feet. It works both ways: type in the square feet box to convert back.
Formula
To convert acres to square feet, multiply by 43,560.
1 ac = 43,560 ft² and 1 ft² = 0.0000229568411387 ac.
Acres to square feet table
| Acres | Square feet |
|---|---|
| 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 |
| 20 ac | 871,200 ft² |
| 50 ac | 2,178,000 ft² |
| 100 ac | 4,356,000 ft² |
Worked examples
0.5 ac in square feet
0.5 ac
21,780 ft²
0.5 × 43,560 = 21,780
5 ac in square feet
5 ac
217,800 ft²
5 × 43,560 = 217,800
50 ac in square feet
50 ac
2,178,000 ft²
50 × 43,560 = 2,178,000
About Acres to Square Feet Converter
This converter turns acres into square feet as you type, and works the other way too: type in the square feet box to convert back. To convert acres to square feet, multiply by 43,560. For example, 0.5 ac is 21,780 ft², and 5 ac is 217,800 ft².
Area is length squared, so the factor between two area units is the square of the factor between the matching length units. That is why a square metre is not 3.28 but about 10.76 square feet. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Acres to Square Feet Converter
- Type the amount in acres in the first box.
- Read the answer in square feet in the second box and in the result line below.
- To convert the other way, type in the square feet box instead, or use the swap button to open the square feet to acres page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Comparing floor areas in property listings
- Ordering flooring, turf or paving
- Understanding farmland and plot sizes
- Checking room sizes on a floor plan
Frequently asked questions
How many square feet are in one acre?
There are 43,560 square feet in one acre. This figure is exact, because both units have fixed definitions.
How do I convert acres to square feet?
To convert acres to square feet, multiply by 43,560. For example, 50 ac is 2,178,000 ft².
How do I convert square feet to acres?
Going the other way, divide by 43,560 (the same as multiplying by 0.00002295684114). The square feet to acres converter does this for you.
What is 10 ac in square feet?
10 ac is 435,600 ft².
Why is the area factor so much bigger than the length factor?
Area multiplies two lengths together, so the length factor is applied twice. One metre is about 3.2808 feet, so one square metre is about 3.2808 × 3.2808 = 10.764 square feet.