Convert acres to square feet
Convert acres to square feet instantly. 1 ac = 43,560 ft². Formula, worked examples and a quick reference table.
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One acre equals 43,560 square feet. To convert any number of acres to square feet, multiply by 43,560.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Area conversions carry a trap that catches people who are perfectly comfortable with length: the factor is squared. There are 3.28 feet in a metre but 10.76 square feet in a square metre, and using the linear factor is the most common error in property arithmetic. Beyond that, land is measured in whatever the local convention prescribes — acres, hectares, and across South Asia bigha, katha and gaj — so the same plot is routinely described in two units that need reconciling.
acres to square feet formula
To go the other way, use acre = square foot ÷ 43,560.
About these units
An acre is 43,560 square feet, historically about the area one person could plough in a day with a yoke of oxen. It is still standard in US and UK land dealings.
The square foot remains the standard for property area in the US, India and much of the Middle East. There are 10.764 square feet in a square metre — not 3.28, a mistake that comes from squaring the linear factor only once.
Acre is also written acres. Square Foot is also written square feet, sq ft, sqft, ft2 and ft^2.
Sources
acres to square feet conversion table
| Acre | Square Foot |
|---|---|
| 1 ac | 43,560 ft² |
| 2 ac | 87,120 ft² |
| 3 ac | 130,680 ft² |
| 5 ac | 217,800 ft² |
| 10 ac | 435,600 ft² |
| 20 ac | 871,200 ft² |
| 25 ac | 1,089,000 ft² |
| 50 ac | 2,178,000 ft² |
| 100 ac | 4,356,000 ft² |
| 250 ac | 10,890,000 ft² |
| 500 ac | 21,780,000 ft² |
| 1,000 ac | 43,560,000 ft² |
Frequently asked questions
How many square feet are in a acre? +
There are 43,560 square feet in one acre.
What is 10 ac in ft²? +
10 ac equals 435,600 ft². Multiply 10 by 43,560.
How do I convert square foot back to acre? +
Use acre = square foot ÷ 43,560. The converter above handles both directions, or see our dedicated square feet to acres page.
How accurate is this acre to square foot conversion? +
The factor used is 43,560, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate ac to ft² in my head? +
Multiply by 87120 and divide by 2. That approximates the true factor of 43,560 exactly, which is close enough for a mental estimate.