Convert Hectares to Square Kilometres (ha to km2)
1 hectare (ha) = 0.01 square kilometres (km²). 1 km² = 100 ha. Example: 15 ha = 15 × 0.01 = 0.15 km².
Also searched as hectares to km2, hectares in km2, hectares into square kilometres, ha to km2, ha in square kilometres, ha into square kilometre, hectare to square kilometre, ha to square kilometres converter, hectares to square kilometers and how many square kilometres in a hectare.
1 ha = 0.01 km²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk hectare to square kilometre converter to paste a column from Excel.
How to Convert Hectare to Square Kilometre
- 1 ha = 0.01 km²
- 1 km² = 100 ha
- Example: convert 15 ha to km²: 15 ha = 15 × 0.01 km² = 0.15 km²
Formula
km² = ha ÷ 100
Derivation from SI units:
- 1 ha = 100 m × 100 m = 10 000 m² (a non-SI unit accepted for use with the SI)
- 1 km² = (1000 m)² = 10⁶ m² = 100 ha
- 1 ha = 10000 m² ÷ 1000000 m² per km² = 0.01 km²
Both units are defined exactly, so the factor is exact. Hectare definition: hectare; Square Kilometre definition: square kilometre.
Worked examples
- A reading of 1 ha converts to 0.01 km².
1 ha × 0.01 = 0.01 km² - A value of 20 ha is 0.2 km².
20 ha × 0.01 = 0.2 km²
Hectare to Square Kilometre conversion table
| Hectares (ha) | Square Kilometres (km²) |
|---|---|
| 0.01 ha | 0.0001 km² |
| 0.1 ha | 0.001 km² |
| 0.25 ha | 0.0025 km² |
| 0.5 ha | 0.005 km² |
| 1 ha | 0.01 km² |
| 2 ha | 0.02 km² |
| 2.5 ha | 0.025 km² |
| 5 ha | 0.05 km² |
| 10 ha | 0.1 km² |
| 20 ha | 0.2 km² |
| 40.4686 ha | 0.404686 km² |
| 50 ha | 0.5 km² |
| 100 ha | 1 km² |
| 1000 ha | 10 km² |
Where it's used
Hectares are used for farm and forest land, while square kilometres appear in city, lake and country areas. Both measure area, so the conversion is a fixed factor.
Hectare to other area units
| Conversion | 1 ha equals |
|---|---|
| hectare to square kilometre | 0.01 km² |
| hectare to square meter | 10000 m² |
| hectare to square centimeter | 100000000 cm² |
| hectare to square foot | 107639.1042 ft² |
| hectare to square inch | 15500031 in² |
| hectare to acre | 2.471053815 ac |
| hectare to square millimeter | 10000000000 mm² |
| hectare to square yard | 11959.90046 yd² |
Show 1 more units
| hectare to square mile | 0.003861021585 mi² |
|---|
Frequently asked questions
How many square kilometres are in 1 hectare?
1 ha = 0.01 km².
How do I convert hectares to square kilometres?
Multiply the value in ha by 0.01, or divide it by 100. For example, 15 ha × 0.01 = 0.15 km².
Is the ha to km² conversion exact?
Yes. Both units are defined exactly, and 1 ha is exactly 0.01 km².
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8, non-SI units accepted for use with the SI.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Hectares to Square Kilometres (ha to km2). Retrieved October 25, 2026, from https://scientificconverters.com/area/hectares-to-square-kilometers/
IEEE
Scientific Converters, "Convert Hectares to Square Kilometres (ha to km2)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/area/hectares-to-square-kilometers/