Square Kilometers to Hectares
Convert square kilometers (km²) to hectares (ha). Both measure surface measurement, and the conversion comes up in real estate, farming, construction work.
The Formula
``
hectares = square kilometers × 100
square kilometers = hectares × 0.01
`
One square kilometer is 100 hectares, and one hectare is 0.01 square kilometers.
Conversion Table
| Square Kilometers | Hectares |
|---|---|
| 1 km² | 100 ha |
| 2 km² | 200 ha |
| 5 km² | 500 ha |
| 10 km² | 1,000 ha |
| 25 km² | 2,500 ha |
| 50 km² | 5,000 ha |
| 100 km² | 10,000 ha |
| 500 km² | 50,000 ha |
| 1,000 km² | 100,000 ha |
The Other Direction
| Hectares | Square Kilometers |
|---|---|
| 1 ha | 0.01 km² |
| 2 ha | 0.02 km² |
| 5 ha | 0.05 km² |
| 10 ha | 0.1 km² |
| 25 ha | 0.25 km² |
| 50 ha | 0.5 km² |
| 100 ha | 1 km² |
| 500 ha | 5 km² |
| 1,000 ha | 10 km² |
What Each Unit Is
Square Kilometers (km²) — one million square metres. The metric unit for regions, cities and land cover.
Hectares (ha) — exactly 10,000 square metres, or a square 100 m on each side. The metric land unit, introduced with the metric system for agriculture and forestry.
A Sense of Scale
Central Park is 3.4 km²- Manhattan is 59 km²
- Greater London is 1,572 km²
- A hectare is about 2.47 acres
- A rugby pitch is roughly 1 hectare
Precision
The factor 100 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
In Code
`javascript
const squareKilometerToHectare = (value) => value * 100;
``
Where This Conversion Comes Up
- Real estate
- Farming
- Construction
- Landscaping
- Flooring
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 km² with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 km² becomes | Error |
|---|---|---|---|
| 0 | 100 | 13,700 | — |
| 1 | 100 | 13,700 | — |
| 2 | 100 | 13,700 | — |
| 3 | 100 | 13,700 | — |
| 4 | 100 | 13,700 | — |
The right number of significant figures is set by your input, not by the converter. If you measured square kilometers to three significant figures, the answer in hectares is only good to three — writing more digits claims precision the measurement never had.
Other Conversions From Square Kilometers
The same value in every other unit this converter supports for area:
| From | To | Unit |
|---|---|---|
| 1 km² | 1,000,000 m² | Square Meters |
| 1 km² | 10,763,910.42 ft² | Square Feet |
| 1 km² | 1,195,990.05 yd² | Square Yards |
| 1 km² | 0.386102 mi² | Square Miles |
| 1 km² | 247.105 ac | Acres |