Acres to Square Feet
Acres to square feet: multiply by 43,560, since one acre is exactly 43,560 sq ft, the area of a square about 208.7 ft on each side. Half an acre is 21,780 sq ft and a quarter acre is 10,890 sq ft.
Example: 1 acre
43,560 square feet
- 4,840 sq yd
- 4,047 m²
- 0.405 hectares
How many square feet are in an acre?
Exactly 43,560. The tables of US units in NIST Handbook 44 give one acre as 43,560 square feet, so the conversion is a single multiplication:
square feet = acres × 43,560
For a 2.5-acre parcel, 2.5 × 43,560 = 108,900 sq ft. The converter does this as you type and also shows square yards, square meters and hectares. Its Swap button runs the conversion from square feet to acres.
How big is an acre?
An acre is an amount of area with no fixed shape. A square, a long strip and a circle all count as one acre if they cover 43,560 sq ft, and the table gives the dimensions for several shapes:
| Shape | Dimensions |
|---|---|
| Square | 208.7 × 208.7 ft |
| Near-square rectangle | 200 × 217.8 ft |
| Rectangle | 150 × 290.4 ft |
| Long rectangle | 100 × 435.6 ft |
| Strip | 66 × 660 ft |
| Narrow strip | 50 × 871.2 ft |
| Circle | 235.5 ft across |
The square is the easiest to picture: just under 70 yards along each side. To check whether a plot is an acre, multiply its length by its width in feet and compare the result with 43,560.
Acres to square feet table
Each row is the acreage multiplied by 43,560.
| Acres | Square feet |
|---|---|
| 0.1 | 4,356 |
| 0.2 | 8,712 |
| 0.25 | 10,890 |
| 0.3 | 13,068 |
| 0.4 | 17,424 |
| 0.5 | 21,780 |
| 0.6 | 26,136 |
| 0.75 | 32,670 |
| 1 | 43,560 |
| 1.25 | 54,450 |
| 1.5 | 65,340 |
| 2 | 87,120 |
| 2.5 | 108,900 |
| 3 | 130,680 |
| 4 | 174,240 |
| 5 | 217,800 |
| 7.5 | 326,700 |
| 10 | 435,600 |
Fractions of an acre
When a lot is described as a fraction of an acre, this table turns it into square feet. The last column shows the side of a square with that area, which shrinks more slowly than the area does. As a square, half an acre is 147.6 ft on a side, about 71% of the full acre’s 208.7 ft, and a quarter acre is exactly half as wide.
| Fraction | Decimal | Square feet | Side of a square |
|---|---|---|---|
| 1/10 acre | 0.1 | 4,356 | 66 ft |
| 1/8 acre | 0.125 | 5,445 | 73.8 ft |
| 1/5 acre | 0.2 | 8,712 | 93.3 ft |
| 1/4 acre | 0.25 | 10,890 | 104.4 ft |
| 1/3 acre | 0.333 | 14,520 | 120.5 ft |
| 1/2 acre | 0.5 | 21,780 | 147.6 ft |
| 2/3 acre | 0.667 | 29,040 | 170.4 ft |
| 3/4 acre | 0.75 | 32,670 | 180.7 ft |
| 1 acre | 1 | 43,560 | 208.7 ft |
Decimal acres and rounding
An acreage written to two decimal places hides a fair amount of ground, because each hundredth of an acre is 435.6 sq ft. A lot listed at 0.17 acres could be anything from about 7,187 to 7,623 sq ft, since every value from 0.165 to 0.175 rounds to 0.17. Multiplying 0.17 by 43,560 gives 7,405 sq ft, the middle of that span. For a fence, sod or seed order, work from the measured sides of the lot rather than the rounded acreage.
Acres to square yards, square meters and hectares
A square yard is 9 sq ft, so an acre is 43,560 ÷ 9 = 4,840 square yards. For metric units, the international foot is exactly 0.3048 m, which makes a square foot 0.09290304 m². An acre is therefore 4,046.86 m², or 0.405 hectares, and a hectare (10,000 m²) is 2.471 acres or 107,639 sq ft. The converter lists all three alongside every result. To go from a square footage back to acres, with lot-size examples and the median US lot, use the square feet to acres converter.
Questions people ask
How many square feet is half an acre?
21,780 sq ft. Laid out as a square, half an acre is about 147.6 ft on each side; as a rectangle 100 ft wide, it runs 217.8 ft deep.
How many square feet is a quarter acre?
10,890 sq ft. As a square that's about 104.4 ft on each side, exactly half the side of a full square acre. As a lot 75 ft wide, it would be 145.2 ft deep.
How big is an acre in feet?
An acre is 43,560 sq ft in any shape. As a square it measures about 208.7 ft on each side, just under 70 yards. As a strip 66 ft wide it runs 660 ft, and as a circle it's about 235.5 ft across.
How many square meters are in an acre?
4,046.86 square meters, or 0.405 hectares. The foot is defined as exactly 0.3048 m, so a square foot is 0.09290304 m², and 43,560 of them make 4,046.86 m².
How many acres are in a hectare?
2.471 acres. A hectare is 10,000 square meters, which is 107,639 sq ft.
How many square yards are in an acre?
4,840. A square yard is 3 ft × 3 ft, or 9 sq ft, and 43,560 ÷ 9 = 4,840.
How many square feet is 2 acres?
87,120 sq ft, which is 2 × 43,560. Five acres is 217,800 sq ft and 10 acres is 435,600 sq ft.
Sources
- National Institute of Standards and Technology (NIST), NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement. Accessed Oct 19, 2026.