Convert Square Km (km²) to Acre (ac) instantly. Enter any value — result updates live.
Converting Square Km to Acre is a common area conversion. One square km (km²) equals 247.1 acre (ac). Square kilometers measure large land areas like cities, countries, and geographic regions.
This conversion is commonly needed for gardening and landscaping, construction planning, farming and agriculture. Acres are used for land measurement in the US, UK, and former British colonies.
To put square km in perspective: Manhattan island (about 59 km²). In acre, common references include Central Park in NYC (about 843 ac).
Countries are often compared by land area in square kilometers — Russia, the largest country, spans about 17.1 million km², more than 40 times the size of France.
An acre was originally defined as the amount of land a team of oxen could plow in one day.
People frequently convert between square km and acre for:
| Square Km (km²) | Acre (ac) |
|---|---|
| 1 km² | 247.1 ac |
| 2 km² | 494.2 ac |
| 5 km² | 1,236 ac |
| 10 km² | 2,471 ac |
| 15 km² | 3,707 ac |
| 20 km² | 4,942 ac |
| 25 km² | 6,178 ac |
| 30 km² | 7,413 ac |
| 50 km² | 12,000 ac |
| 100 km² | 25,000 ac |
| 200 km² | 49,000 ac |
| 500 km² | 120,000 ac |
| 1000 km² | 250,000 ac |