Hectares to square kilometres – convert ha to km²
Convert hectares to square kilometres (ha to km²) to compare fields, forests and estates with larger regions that are described in km². This is useful for planning, environmental studies, agriculture and land registration.
Open the interactive ha → km² converter:
Use main converter (ha → km²) or switch to km² → haThe area converter on the homepage also supports m², ft², acres and more if you need to jump between several units.
Quick reference: hectares to km²
There are 100 hectares in a square kilometre, so: km² = hectares ÷ 100. Some examples:
| Hectares (ha) | Square kilometres (km²) |
|---|---|
| 10 ha | 0.1 km² |
| 25 ha | 0.25 km² |
| 50 ha | 0.5 km² |
| 100 ha | 1 km² |
| 250 ha | 2.5 km² |
| 500 ha | 5 km² |
| 1000 ha | 10 km² |
Why convert hectares to km²?
Reasons you might convert ha to km²:
- Summarising many small plots into one figure for reports or planning.
- Comparing farm or forest size with towns, parks or regions reported in km².
- Understanding the share of a region that a particular project covers.
- Communicating land use or deforestation scales in a more global unit.
Other area converters on this site
All area conversions on the homepage are tied together, so you can hop from hectares through km² and acres to m² without retyping your value.
Page last updated: 4 December 2025.