Square kilometers (km²) to Acres (ac) Conversion
Square kilometers
The square kilometre is a unit of area equal to one million square metres (10⁶ m²) and is the standard unit for expressing the surface areas of countries, cities, lakes, forests, and other large geographic features. Russia, the world's largest country, covers approximately 17.1 million km². The surface area of Earth is approximately 510.1 million km², of which about 70.8% is ocean.
Acres
The acre is a unit of area equal to exactly 4,046.8564224 square metres, the standard unit for land measurement in the United States and United Kingdom. Its origin lies in medieval English agriculture: an acre was the amount of land a yoke of oxen could plough in a single day, standardised as a furlong (220 yards) long and a chain (22 yards) wide — exactly 43,560 square feet. One square mile contains exactly 640 acres.
| Square kilometers (km²) | Acres (ac) |
|---|---|
| 0.1 km² | 24.7105 ac |
| 1 km² | 247.1054 ac |
| 2 km² | 494.2108 ac |
| 3 km² | 741.3161 ac |
| 5 km² | 1,235.5269 ac |
| 10 km² | 2,471.0538 ac |
| 20 km² | 4,942.1076 ac |
| 30 km² | 7,413.1614 ac |
| 50 km² | 12,355.2691 ac |
| 100 km² | 24,710.5381 ac |
| 1000 km² | 247,105.3815 ac |
Frequently Asked Questions (FAQ)
How many acres are in 1 square kilometers?
1 square kilometers (km²) is exactly 247.105 acres (ac).
How do I convert square kilometers to acres?
Multiply the value in square kilometers by 247.105 to get the result in acres. Or use the converter above — type any number and see the result instantly.