One square kilometer is about 247.105 acres. The exact value is 1,000,000 divided by 4,046.8564224. Multiply square kilometers by 247.1 to get acres. This direction is used mostly by American readers and landholders who meet metric areas in foreign land listings, mining or energy concessions, or international reports. It also helps US farmers who want to compare their own acreage with a regional figure from abroad, since square kilometers are how many countries report total farmland.
Formula
Square Kilometers to Acres conversion table
| Square Kilometers | Acres |
|---|---|
| 0.25 km² | 61.7763 ac |
| 0.5 km² | 123.5527 ac |
| 1 km² | 247.1054 ac |
| 2 km² | 494.2108 ac |
| 3 km² | 741.3161 ac |
| 4 km² | 988.4215 ac |
| 5 km² | 1,235.53 ac |
| 6 km² | 1,482.63 ac |
| 7 km² | 1,729.74 ac |
| 8 km² | 1,976.84 ac |
| 9 km² | 2,223.95 ac |
| 10 km² | 2,471.05 ac |
| 15 km² | 3,706.58 ac |
| 20 km² | 4,942.11 ac |
| 25 km² | 6,177.63 ac |
| 30 km² | 7,413.16 ac |
| 40 km² | 9,884.22 ac |
| 50 km² | 12,355.27 ac |
| 60 km² | 14,826.32 ac |
| 70 km² | 17,297.38 ac |
| 75 km² | 18,532.9 ac |
| 80 km² | 19,768.43 ac |
| 90 km² | 22,239.48 ac |
| 100 km² | 24,710.54 ac |
| 250 km² | 61,776.35 ac |
| 500 km² | 123,552.69 ac |
| 1,000 km² | 247,105.38 ac |
Where you’ll use it
Mining leases, oil and gas blocks, forestry concessions and protected areas are often defined in square kilometers, while US investors and landowners compare land in acres. A 5 km² concession is about 1,235.5 acres. Farmers comparing their own operation with large overseas estates use the same conversion. For anything under a square kilometer, hectares are the usual metric unit instead.
Tip: Using 250 acres per square kilometer is an easy mental shortcut, but it overstates every result by about 1.2%. On a 100 km² block that adds roughly 290 acres.