Acres to Square Feet Converter
Convert acres to square feet in one step. Enter an area in acres and get square feet, with the formula, lot-size examples and a quick-reference table below.
Square Feet = Acres × 43,560
Acres to Square Feet Formula
One acre is exactly 43,560 square feet, so to convert acres to square feet you multiply by 43,560. To convert square feet back to acres, divide by 43,560. The factor is exact, so accuracy depends only on how many decimals you keep.
About Acres and Square Feet
An acre is a unit of land area used in the United States, the UK, Canada, India and other countries. Historically it was the area a team of oxen could plough in a day; today it is defined as exactly 4,046.8564224 square meters. A square foot is the area of a square with 1-foot sides, equal to 0.09290304 square meters. Land is usually quoted in acres, while buildings, rooms and small plots are quoted in square feet.
How to Convert Acres to Square Feet
- Enter the area in acres. Decimals such as 0.25 or 2.75 are fine.
- The answer in square feet appears instantly, or press Convert Now. Square yards, square meters and hectares are shown as side values.
- Use Swap Units to convert square feet to acres, Copy Result to copy the answer, or Clear to start again.
By hand: multiply the acres by 43,560. Area cannot be negative, so only zero and positive values are accepted. This converter uses the international acre; the US survey acre is about 0.0004% larger, which only matters in formal surveys.
Practical Examples
- Quarter-acre lot: 0.25 × 43,560 = 10,890 sq ft.
- Half-acre plot: 0.5 acre is 21,780 sq ft.
- Farm field: 12.5 acres is 544,500 sq ft.
- Large estate: 40 acres is 1,742,400 sq ft.
- Square mile: 640 acres is 27,878,400 sq ft.
Acres to Square Feet – Common Values
Quick reference for frequently used conversions
| Acres (ac) | Square Feet (sq ft) | Square Meters (m²) |
|---|---|---|
| 0.1 ac | 4,356 sq ft | 404.69 m² |
| 0.25 ac | 10,890 sq ft | 1,011.71 m² |
| 0.5 ac | 21,780 sq ft | 2,023.43 m² |
| 0.75 ac | 32,670 sq ft | 3,035.14 m² |
| 1 ac | 43,560 sq ft | 4,046.86 m² |
| 1.5 ac | 65,340 sq ft | 6,070.28 m² |
| 2 ac | 87,120 sq ft | 8,093.71 m² |
| 2.5 ac | 108,900 sq ft | 10,117.14 m² |
| 5 ac | 217,800 sq ft | 20,234.28 m² |
| 10 ac | 435,600 sq ft | 40,468.56 m² |
| 20 ac | 871,200 sq ft | 80,937.13 m² |
| 40 ac | 1,742,400 sq ft | 161,874.26 m² |
| 80 ac | 3,484,800 sq ft | 323,748.51 m² |
| 100 ac | 4,356,000 sq ft | 404,685.64 m² |
| 160 ac | 6,969,600 sq ft | 647,497.03 m² |
| 640 ac | 27,878,400 sq ft | 2,589,988.11 m² |
Where and Why This Conversion Is Used
Acres suit large areas and square feet suit smaller ones, so property and construction work moves between them constantly.
- Real estate: listings quote lot size in acres, while zoning rules and building coverage are set in square feet.
- Construction and planning: estimating how many homes, parking spaces or solar panels fit on a plot.
- Farming and landscaping: seed, fertilizer, turf and mulch are often priced per square foot or per acre.
- Land valuation: comparing a price per acre with a price per square foot.
- Public land and conservation: park and reserve sizes are reported in acres.
For hectares and Indian land units see the Acre to Hectare Calculator and the land-focused Acre to Square Feet Calculator.