Acres to Square Feet Converter
Unit ConversionConvert acres to square feet. 1 acre equals exactly 43,560 square feet, with a conversion table, worked examples and the reverse conversion.
Square Feet
Equivalent area in square feet
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Unit Conversion calculators
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SponsoredThis converter turns acres into square feet (acre to sq ft). Enter a value and the result updates as you type. 1 acre equals exactly 43,560 square feet.
US land listings give lot sizes in acres, while house plans, building permits and flooring quotes use square feet, so this conversion puts a lot size into the same unit as a floor plan. It also answers the everyday question of how big a lot really is when a listing gives only its acreage.
The result is rounded to 2 decimal places, but the factor behind it never is, so long chains of conversions stay accurate. You can type decimals, thousands separators or fractions such as 2 1/2, and the conversion table below lists common values.
How Many Square Feet in an Acre
There are 43,560 square feet in one acre. NIST defines the acre as 10 square chains, and a chain is 66 feet, so 10 × 66 × 66 = 43,560. The number never changes with the shape of the land.
How to Convert Acres to Square Feet
To convert acres to square feet, multiply by 43,560. For example, 2.5 acres equals exactly 108,900 square feet.
To go from square feet back to acres, divide by 43,560. For example, 10,000 square feet is about 0.229568 acres.
Acres to Square Feet Conversion Table
Common values in acres converted to square feet, rounded to 2 decimal places.
| Acres | Square Feet |
|---|---|
| 0.1 ac | 4,356 ft² |
| 0.18 ac | 7,840.8 ft² |
| 0.25 ac | 10,890 ft² |
| 0.26 ac | 11,325.6 ft² |
| 0.29 ac | 12,632.4 ft² |
| 0.32 ac | 13,939.2 ft² |
| 0.36 ac | 15,681.6 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 |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 20 ac | 871,200 ft² |
| 40 ac | 1,742,400 ft² |
| 100 ac | 4,356,000 ft² |
Acres to Feet
An acre is an area, so it converts to square feet, not to feet. A length only follows once the shape is known. A square acre is about 208.71 feet on each side, and a lot 66 feet wide has to be 660 feet long to make one acre, the chain by furlong rectangle of NIST's definitions.
| Lot Width | Depth for 1 Acre | Depth for 0.5 Acre |
|---|---|---|
| 50 ft | 871.2 ft | 435.6 ft |
| 66 ft | 660 ft | 330 ft |
| 75 ft | 580.8 ft | 290.4 ft |
| 100 ft | 435.6 ft | 217.8 ft |
| 150 ft | 290.4 ft | 145.2 ft |
| 200 ft | 217.8 ft | 108.9 ft |
For a lot of a different shape, measure it in square feet and convert. The Square Root Calculator gives the side of a square from its area, and the Fence Perimeter Calculator works out how much fencing goes around it.
Frequently Asked Questions
How many square feet is 25 acres?
25 acres equals exactly 1,089,000 square feet.
How many square feet is 3 acres?
3 acres equals exactly 130,680 square feet.
How many square feet is a third of an acre?
Exactly 14,520 square feet, since 43,560 divided by 3 is 14,520.
How do I convert acres to square feet in Excel?
With the value in cell A2, use =A2*43560, or =CONVERT(A2,"uk_acre","ft2"). Format the cell to show the decimals you need; Excel keeps the full value behind the display.
What happens if I enter a negative number?
The result shows a dash. An area is a size, so it is never below zero; a negative value usually means a typing mistake, such as a stray minus sign.
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