Convert square miles to acres and acres to square miles instantly. Bidirectional area converter with formula and common values.
To convert square miles to acres, multiply by 640. This is the standard conversion used in US land surveying and real estate.
| Square Miles | Acres |
|---|---|
| 0.25 | 160 |
| 0.5 | 320 |
| 1 | 640 |
| 2.5 | 1,600 |
| 5 | 3,200 |
| 36 | 23,040 |
| 100 | 64,000 |
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Half a square mile equals 320 acres (0.5 × 640).
Multiply the number of square miles by 640. For example, 0.5 sq mi × 640 = 320 acres.
A square mile is 640 acres, 27,878,400 square feet, or approximately 2.59 square kilometers. Manhattan is about 22.8 square miles.
They are the same — a square that is one mile on each side. Both equal 640 acres or approximately 2.59 km².