Square Kilometers (km²)
Area · Metric
Main conversion
1 km² = 1,000,000 m² (100 ha)
Description and history
The square kilometer (symbol km²) equals 1,000,000 square meters, or 100 hectares.
Land-use planning, watershed management, reclamation districts and regional or national agricultural statistics use it as a reference unit.
Reference conversions
| Unit | Equals |
|---|---|
| Square Meters (m²) | 1 km² = 1,000,000 m² |
| Hectares (ha) | 1 km² = 100 ha |
| Are (a) | 1 km² = 10,000 a |
| Acres (ac) | 1 km² = 247.11 ac |