Hectare to Square Kilometer Converter
Area · unit-converter
Convert Hectare to Square Kilometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use square-meter-based definitions (international feet / yard standards, acre, hectare, and regional units like pyeong/tsubo).
Calculator
From: Hectare (ha)
To: Square Kilometer (km2)
About Hectare
The hectare is 10,000 square meters (100 m × 100 m). It is widely used for farmland, forests, and land registration outside the US.
About Square Kilometer
The square kilometer is a metric unit equal to one million square meters. It is standard for city sizes, large properties, and regional planning in metric countries.
How to convert hectares to square kilometers
1 hectare is equal to 0.01 square kilometer:
1 ha = (10000 m² ÷ 1000000 m²) km2 = 0.01 km2
Each hectare is defined as 10000 m² and each square kilometer as 1000000 m², so one ha equals 10000 ÷ 1000000 km2 = 0.01 km2.
Let a(ha) be the numeric value of the same area measured in Hectare (ha), and a(km2) the value in Square Kilometer (km2). Then:
a(km2) = a(ha) × (10000 / 1000000)
Equivalently, divide by how many ha fit into one km2 (m² per km2 divided by m² per ha):
a(km2) = a(ha) ÷ 100
Or: square kilometer = hectare ÷ 100
Examples
Example #1: Convert 20 ha to square kilometer
20 ha = 20 ha × (10000/1000000) km2 = 0.2 km2
20 ha = 20 ha ÷ 100 = 0.2 km2
Example #2: Convert 50 ha to square kilometer
50 ha = 50 ha × (10000/1000000) km2 = 0.5 km2
50 ha = 50 ha ÷ 100 = 0.5 km2
Summary
To convert Hectare to Square Kilometer, multiply the value in ha by the ratio of square meters per ha divided by square meters per km2. Equivalently: value_km2 = value_ha × (10000 / 1000000). Numerically, 1 ha equals 0.01 km2.
Relationship context
Both units are metric (SI) and tied to the square meter. Conversions use exact ratios from their m² definitions. The factor from Hectare to Square Kilometer is 1.000000e-2 (1 ha = 0.01 km2).
Conversion tables
| Hectare (ha) | Square Kilometer (km2) |
|---|---|
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 6 | 0.06 |
| 7 | 0.07 |
| 8 | 0.08 |
| 9 | 0.09 |
| Hectare (ha) | Square Kilometer (km2) |
|---|---|
| 10 | 0.1 |
| 20 | 0.2 |
| 30 | 0.3 |
| 40 | 0.4 |
| 50 | 0.5 |
| 60 | 0.6 |
| 70 | 0.7 |
| 80 | 0.8 |
| 90 | 0.9 |
| 100 | 1 |