To convert hectares to square kilometers, divide by 100. One hectare is exactly 0.01 km². 25,000 hectares is 250 km². You need this direction when many fields, farms or forest stands recorded in hectares are added up and the total is easier to understand, map or report in square kilometers. Because the factor is exactly 100, the conversion never introduces rounding of its own; any rounding comes from the hectare figure you start with.
Formula
Hectares to Square Kilometers conversion table
| Hectares | Square Kilometers |
|---|---|
| 1 ha | 0.01 km² |
| 2 ha | 0.02 km² |
| 5 ha | 0.05 km² |
| 10 ha | 0.1 km² |
| 20 ha | 0.2 km² |
| 25 ha | 0.25 km² |
| 50 ha | 0.5 km² |
| 75 ha | 0.75 km² |
| 100 ha | 1 km² |
| 200 ha | 2 km² |
| 250 ha | 2.5 km² |
| 500 ha | 5 km² |
| 1,000 ha | 10 km² |
| 2,000 ha | 20 km² |
| 5,000 ha | 50 km² |
| 10,000 ha | 100 km² |
Where you’ll use it
Wildfires in Europe, Australia and Canada are often reported in hectares, and readers frequently want the equivalent in square kilometers to compare with a city or region. Large farms and forestry estates add up the same way. Square kilometers are also the usual unit for map scale, for population density and for comparing an estate with the municipality it sits in.
Tip: If your hectare figure has decimals, keep them before dividing. 1,234.56 hectares is 12.3456 km²; rounding the hectares to 1,200 first would lose more than a third of a square kilometer.