Square Feet to Acres Converter
Unit ConversionConvert square feet to acres. 1 square foot is about 0.0000229568 acres, with a conversion table, worked examples and the reverse conversion.
Acres
Equivalent area in acres
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Unit Conversion calculators
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SponsoredThis converter turns square feet into acres (sq ft to acre). Enter a value and the result updates as you type. 1 square foot is about 0.0000229568 acres.
One acre is 43,560 square feet, so dividing a square footage by 43,560 gives the acreage. A quick estimate is to divide by 44,000, which comes out about 1% low. Lot sizes, farm fields and parks are listed in acres, while houses and rooms are measured in square feet, so this is the conversion for reading a survey or a listing in acres.
The result is rounded to 6 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 to Convert Square Feet to Acres
To convert square feet to acres, divide by 43,560. For example, 21,780 square feet equals exactly 0.5 acres.
To go from acres back to square feet, multiply by 43,560. For example, 2.5 acres equals exactly 108,900 square feet.
Square Feet to Acres Conversion Table
Common values in square feet converted to acres, rounded to 6 decimal places.
| Square Feet | Acres |
|---|---|
| 1,000 ft² | 0.022957 ac |
| 2,500 ft² | 0.057392 ac |
| 5,000 ft² | 0.114784 ac |
| 7,000 ft² | 0.160698 ac |
| 7,400 ft² | 0.169881 ac |
| 7,500 ft² | 0.172176 ac |
| 8,712 ft² | 0.2 ac |
| 9,500 ft² | 0.21809 ac |
| 10,000 ft² | 0.229568 ac |
| 10,454 ft² | 0.239991 ac |
| 15,000 ft² | 0.344353 ac |
| 16,000 ft² | 0.367309 ac |
| 20,000 ft² | 0.459137 ac |
| 21,780 ft² | 0.5 ac |
| 30,000 ft² | 0.688705 ac |
| 43,560 ft² | 1 ac |
| 50,000 ft² | 1.147842 ac |
| 100,000 ft² | 2.295684 ac |
| 1,000,000 ft² | 22.956841 ac |
Lot Sizes in Square Feet
Lots are often described as a fraction of an acre. Each square-foot figure is exact for the fraction it stands for; a third of an acre, shown rounded as 0.333333, is 14,520 square feet.
| Lot Size | Square Feet |
|---|---|
| 0.125 ac | 5,445 ft² |
| 0.25 ac | 10,890 ft² |
| 0.333333 ac | 14,520 ft² |
| 0.5 ac | 21,780 ft² |
| 0.75 ac | 32,670 ft² |
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 5 ac | 217,800 ft² |
An acre has no fixed shape, so a lot of 43,560 square feet is one acre whether it is square, long and narrow, or irregular. To find the square footage of a lot from its sides, use the Square Footage Calculator, then convert it here.
How Many Acres Is a Football Field
An American football field is 360 feet long and 160 feet wide including both end zones, 57,600 square feet, which is about 1.3223 acres. Between the goal lines it is 300 feet by 160 feet, 48,000 square feet, about 1.1019 acres. So an acre is about three quarters of a full field, end zones included.
In metric terms the full field is about 5,351.2 square meters. Land prices are usually compared per acre, and the Price per Acre Calculator divides a sale price by the acreage.
Frequently Asked Questions
How many acres is a lot?
There is no fixed size. A lot is a parcel defined by its deed and by local zoning, so check the square footage or acreage on the deed or survey, then convert it here.
How many acres is 9,000 square feet?
9,000 square feet is about 0.206612 acres.
How many acres is 12,000 square feet?
12,000 square feet is about 0.275482 acres.
How do I convert square feet to acres in Excel?
With the value in cell A2, use =A2/43560, or =CONVERT(A2,"ft2","uk_acre"). Format the cell to show the decimals you need; Excel keeps the full value behind the display.
Is the square feet to acres factor exact?
The reverse direction is: 1 acre equals exactly 43,560 square feet, because NIST defines the acre as 10 square chains, and a chain is 66 feet, so the acre is 10 × 66 × 66 square feet. In this direction the factor has no finite decimal form, so 1 square foot is about 0.0000229568 acres. The calculator divides by the exact value and rounds only the result it shows.
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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