Convert Hectare to Square Kilometer
Convert hectares to square kilometers instantly. 1 hectare = 0.01 square kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Kilometer to Hectare converter for the reverse conversion.
Units explained
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Square Kilometer
A square kilometer is a metric unit of area equal to 1,000,000 m² (one million square meters), or 100 hectares. It is used for measuring large land areas, regional geography, and country-scale statistics.
Derived by squaring the kilometer (1000 m). The kilo- prefix comes from the Greek 'chilioi' (thousand).
Square kilometers express the area of cities, districts, lakes, forests, and entire countries. India's total area is approximately 3,287,263 km². 1 km² equals 100 hectares or about 247.105 acres.
Kilometer has been part of the metric system since 1795.
Hectare to Square Kilometer conversion formula
The relationship between hectares and square kilometers:
To convert hectares to square kilometers, multiply the value in hectares by 0.01. To reverse, multiply square kilometers by 100.
How to use this converter
Type a value into the calculator. The result in square kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Kilometer to Hectare converter for the reverse direction.
Step-by-step: convert hectares to square kilometers
- Write down the value in hectares (ha).
- Multiply that value by the factor 0.01.
- The product is the equivalent value in square kilometers (km²).
- To reverse, multiply the square kilometer value by 100.
Worked examples
Example 1 — Convert 1 ha to km²:
1 × 0.01 = 0.01 km²
Example 2 — Convert 100 ha to km²:
100 × 0.01 = 1 km²
Real-world example — Coastal cruise distances
A 10-hectare coastal sailing route converts to a different value in square kilometers — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 ha × 0.01 = 0.1 km²
Real-world example — Road-sign distances across systems
A 100-hectare road sign converts cleanly into square kilometers — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 ha × 0.01 = 1 km²
Real-world example — Endurance race distances
A 50-hectare cycling or running race converts to a recognizable distance in square kilometers. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 ha × 0.01 = 0.5 km²
Hectare to Square Kilometer conversion table
Standard reference values for converting hectares to square kilometers:
| Hectare [ha] | Square Kilometer [km²] |
|---|---|
| 0.01 | 0.0001 |
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 30 | 0.3 |
| 40 | 0.4 |
| 50 | 0.5 |
| 100 | 1 |
| 500 | 5 |
| 1000 | 10 |
Frequently asked questions
How many square kilometers is 1 hectare?
How do I convert hectares to square kilometers?
How do I convert square kilometers back to hectares?
How many square kilometers is 100 hectares?
Popular area unit conversions
Convert Hectare to other area units
Show all Hectare conversions
Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ha = 0.01 km²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.