To convert square miles to US survey acres, multiply the value by 639.997. To go the other way, multiply US survey acres by 0.00156251 to get square miles.
| Square Miles (mi²) | US Survey Acres (ac (US)) |
|---|---|
| 1 mi² | 639.997 ac (US) |
| 2 mi² | 1,279.99 ac (US) |
| 5 mi² | 3,199.99 ac (US) |
| 10 mi² | 6,399.97 ac (US) |
| 20 mi² | 12,799.9 ac (US) |
| 50 mi² | 31,999.9 ac (US) |
| 100 mi² | 63,999.7 ac (US) |
| 500 mi² | 319,999 ac (US) |
| 1,000 mi² | 639,997 ac (US) |
Square mile (mi²). A square mile is 640 acres (2.58999 km²).
US survey acre (ac (US)). The US survey acre is 43,560 square US survey feet (4,046.8726 m²), used in US land records.
There are 639.997 US survey acres in one square mile.
Multiply the number of square miles by 639.997. For example, 10 square miles equal 6,399.97 US survey acres.
One US survey acre equals 0.00156251 square miles.