Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert acres to square feet, square yards, square meters, hectares, and more.
An acre is the standard unit for measuring land area in the United States -- used on property deeds, real estate listings, farm and ranch sizing, and zoning documents -- while square feet is the unit most construction, landscaping, and interior-space measurements actually use. This tool converts between the two exactly, and also shows the same land area in square yards, square meters, hectares, square miles, and square kilometers at once, so you don't need six separate calculators for one parcel of land.
Enter your land area and choose which unit it's currently in from the "From Unit" dropdown (Acres, Square Feet, Square Yards, Square Meters, Hectares, Square Miles, or Square Kilometers). The result grid below updates instantly, showing your value converted into every other unit at once -- there's no separate "to unit" step, since all seven units are calculated together as you type.
Square Feet = Acres × 43,560
Acres = Square Feet ÷ 43,560
An acre is defined as exactly 43,560 square feet -- a figure that traces back to English agricultural history (originally the area a yoke of oxen could plow in a day, later standardized to a precise measurement). This is an exact conversion factor, not an approximation, so the result is mathematically precise.
| Acres | Square Feet | Square Yards | Hectares |
|---|---|---|---|
| 0.25 | 10,890 | 1,210 | 0.1012 |
| 0.5 | 21,780 | 2,420 | 0.2023 |
| 1 | 43,560 | 4,840 | 0.4047 |
| 5 | 217,800 | 24,200 | 2.0234 |
| 10 | 435,600 | 48,400 | 4.0469 |
Real estate agents and buyers use this to compare lot sizes listed in acres against a construction footprint measured in square feet. Farmers and land surveyors use it to convert between deed acreage and field measurements. It's also useful alongside a home project calculator -- once you know your lot's square footage, tools like the Square Footage Calculator or Gravel Calculator can help plan what goes on it.
This converts area only -- it assumes you already have a measured or deeded square footage or acreage figure. It does not calculate area from a property's boundary dimensions; for that, measure or calculate the footprint first (length × width for a rectangular lot).
Suppose a listing describes 2.5 acres of land, and you want to know how much of it a planned building would cover. Multiply 2.5 by 43,560 to get 108,900 square feet. If the building footprint is 3,200 square feet, then it would occupy about 2.9 percent of the parcel (3,200 divided by 108,900). Using the same result grid, you can also read the parcel as roughly 12,100 square yards or about 1.01 hectares, which helps when comparing with a listing from another country. These numbers are hypothetical, but the steps are the same for any parcel.
A deed or listing figure is the total area of the parcel. It does not tell you how much of the land you can actually build on, plant, or fence. Slopes, wetlands, easements, setbacks, and utility corridors can all reduce the usable portion, and rules differ by location. Confirm the details with the local planning office, your title documents, or a licensed surveyor before making decisions based on a converted number.
Exactly 43,560 square feet -- this is a fixed, exact definition, not a rounded approximation.
The acre predates the square foot as a standardized unit; it was historically defined by furlongs and chains (agricultural plowing measurements) that don't divide evenly into feet, which is why 43,560 looks like an unusual number today.
This varies enormously by location, but 0.15-0.5 acres (about 6,500-21,800 sqft) is common for suburban single-family lots in much of the US.
Yes -- the converter includes square meters and hectares alongside the US customary units, so it works for international property comparisons as well.
Yes. Choose Square Feet in the From Unit dropdown and the acre result appears in the grid along with the other units.
Not always. Listing figures may be rounded or taken from older records, so check a recent survey or the recorded deed when the exact size matters.
The grid does it for you, but a useful check is that a square mile contains 640 acres, so divide the acreage by 640.
The exact acres-to-square feet factor is 43,560 -- multiply to convert forward, or multiply by 0.00002296 to convert square feet back to acres. For example, 12.5 acres × 43,560 = 544,500 square feet, and 150 acres × 43,560 = 6,534,000 square feet.
One acre equals exactly 43,560 square feet, historically the area one ox could plow in a day. One square foot equals exactly 144 square inches, or about 0.0929 square meters.
| Acres | Square Feet |
|---|---|
| 1 | 43,560 |
| 2 | 87,120 |
| 3 | 130,680 |
| 5 | 217,800 |
| 10 | 435,600 |
| 15 | 653,400 |
| 20 | 871,200 |
| 25 | 1,089,000 |
| 50 | 2,178,000 |
| 75 | 3,267,000 |
| 100 | 4,356,000 |
| 250 | 10,890,000 |
| 500 | 21,780,000 |
| 1,000 | 43,560,000 |
How many square feet are in 1 acres?
1 acres equals 43,560 square feet.
How many acres are in 1 square feet?
1 square feet equals 0.00002296 acres.
What is 3.5 acres in square feet?
3.5 acres equals 152,460 square feet, using the same 43,560 factor as the rest of this chart.
Is this conversion exact or approximate?
The 43,560 factor comes from a fixed, exact definitional constant, so the underlying math is exact; the numbers on this page are rounded to seven significant digits for readability, and the calculator above keeps the full-precision value.
Values are rounded to seven significant digits for display; the converter above uses the full-precision factor.
Reference: NIST Weights and Measures