Acres to Square Feet Converter
Type acres to get square feet. An acre is exactly 43,560 sq ft, so a quarter-acre lot is 10,890 sq ft.
0.25 ac =
10,890ft²
0.25 acres is 10,890 square feet.
- 1 ac
- 43,560 ft²
- 1 ft²
- 0.00002296 ac
How to convert acres to square feet
Multiply acres by 43,560. That number is the definition: an acre is one chain (66 ft) by one furlong (660 ft), and 66 × 660 = 43,560 square feet, exactly.
Half an acre is 21,780 sq ft, a third of an acre 14,520 sq ft, and two acres 87,120 sq ft. A 5,000 sq ft city lot, going the other way, is 5,000 ÷ 43,560 = 0.115 acres, a little more than a ninth of an acre.
An acre does not have to be any particular shape. If it were a square, each side would be 208.7 ft (the square root of 43,560), which is a useful picture when you walk a property line.
square feet = acres × 43,560
- One acre is 43,560 square feet, 4,840 square yards, or 1/640 of a square mile; a chain is 66 ft and a furlong 660 ft. Source: NIST Handbook 44, Appendix C: General Tables of Units of Measurement.
How to estimate acres to square feet in your head
Use 44,000 and take off 1%. For 0.5 acres, 0.5 × 44,000 = 22,000, minus 220 is 21,780, the exact answer.
Lot sizes are often quoted in fractions, so learn the quarter: a quarter acre is 10,890 sq ft, about a 104 ft square. A tenth of an acre is 4,356 sq ft.
Acres to square feet chart
Common lot sizes in square feet and square meters, with the side of a square lot of that area.
| Acres | Square feet | Square meters | Square lot, side in feet |
|---|---|---|---|
| 0.1 | 4,356 | 404.686 | 66 |
| 1/8 | 5,445 | 505.857 | 73.8 |
| 0.2 | 8,712 | 809.371 | 93.3 |
| 1/4 | 10,890 | 1,011.71 | 104.4 |
| 1/3 | 14,520 | 1,348.95 | 120.5 |
| 1/2 | 21,780 | 2,023.43 | 147.6 |
| 3/4 | 32,670 | 3,035.14 | 180.7 |
| 1 | 43,560 | 4,046.86 | 208.7 |
| 1.5 | 65,340 | 6,070.28 | 255.6 |
| 2 | 87,120 | 8,093.71 | 295.2 |
Show all 15 rowsShow fewer
| 2.5 | 108,900 | 10,117.1 | 330 |
| 3 | 130,680 | 12,140.6 | 361.5 |
| 5 | 217,800 | 20,234.3 | 466.7 |
| 10 | 435,600 | 40,468.6 | 660 |
| 20 | 871,200 | 80,937.1 | 933.4 |
Frequently Asked Questions
How many square feet is a quarter acre?
A quarter acre is 10,890 square feet (43,560 ÷ 4). As a square it would be about 104 ft on each side.
How many acres is 10,000 square feet?
10,000 sq ft is 0.23 acres (10,000 ÷ 43,560), a little under a quarter acre.
How long is one side of an acre?
If the acre is square, about 208.7 ft. In its traditional shape it is a strip one chain (66 ft) wide and one furlong (660 ft) long.