Convert acres to square feet and square feet to acres instantly. Bidirectional area converter with formula and common values.
To convert acres to square feet, multiply by 43,560. One acre is defined as exactly 43,560 square feet, a measurement derived from historical agricultural practices.
| Acres | Square Feet |
|---|---|
| 0.25 | 10,890 |
| 0.5 | 21,780 |
| 1 | 43,560 |
| 2.5 | 108,900 |
| 5 | 217,800 |
| 40 | 1,742,400 |
| 100 | 4,356,000 |
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One acre equals exactly 43,560 square feet.
Multiply the number of acres by 43,560. For example, 2.5 acres × 43,560 = 108,900 square feet.
An acre was historically defined as the area a yoke of oxen could plow in one day. It equals one chain (66 ft) by one furlong (660 ft), which is 43,560 sq ft.
A quarter acre is 10,890 square feet (0.25 × 43,560). This is a common residential lot size in many suburbs.