Hectare to Square Kilometer Converter
1 ha = 0.01 km² — convert instantly with formula and table.
100 hectares make one square kilometer, so hectares ÷ 100 = km²: 4.5 ha = 0.045 km². Forestry, national parks and city districts move between the two constantly.
Where you'll meet this conversion
- A 250 ha nature reserve is 2.5 km².
- Manhattan (59.1 km²) is 5,910 ha.
- A 30 ha solar farm is 0.3 km².
Common mistake
Dividing by 1,000 or 10,000 (those are the m² and cm² steps). Between ha and km² it is exactly 100.
Quick answer: one hectare equals 0.01 square kilometers. So to convert hectares to square kilometers, multiply by 0.01.
How to convert hectares to square kilometers
square kilometers = hectares × 0.01
The hectare is a 100 m × 100 m square (10,000 m²), the metric unit of farmland and forestry worldwide. One hectare is about 2.47 acres.
The square kilometer (a million square meters) measures cities, lakes and countries — about 0.386 square miles.
Hectare to Square kilometer conversion table
| Hectare (ha) | Square kilometer (km²) |
|---|---|
| 0.01 ha | 0.0001 km² |
| 0.1 ha | 0.001 km² |
| 0.25 ha | 0.0025 km² |
| 0.4 ha | 0.004 km² |
| 0.75 ha | 0.0075 km² |
| 1.25 ha | 0.0125 km² |
| 1.75 ha | 0.0175 km² |
| 2.5 ha | 0.025 km² |
| 3.5 ha | 0.035 km² |
| 4.5 ha | 0.045 km² |
| 6 ha | 0.06 km² |
| 8 ha | 0.08 km² |
| 10 ha | 0.1 km² |
| 12 ha | 0.12 km² |
| 14 ha | 0.14 km² |
| 16 ha | 0.16 km² |
| 18 ha | 0.18 km² |
| 20 ha | 0.2 km² |
| 24 ha | 0.24 km² |
| 26 ha | 0.26 km² |
| 30 ha | 0.3 km² |
| 35 ha | 0.35 km² |
| 45 ha | 0.45 km² |
| 55 ha | 0.55 km² |
| 65 ha | 0.65 km² |
| 75 ha | 0.75 km² |
| 85 ha | 0.85 km² |
| 95 ha | 0.95 km² |
| 110 ha | 1.1 km² |
| 125 ha | 1.25 km² |
| 175 ha | 1.75 km² |
| 250 ha | 2.5 km² |
| 350 ha | 3.5 km² |
| 450 ha | 4.5 km² |
| 600 ha | 6 km² |
| 750 ha | 7.5 km² |
| 900 ha | 9 km² |
| 1,500 ha | 15 km² |
| 2,500 ha | 25 km² |
| 10,000 ha | 100 km² |
Need the opposite direction? Use the Square kilometer to Hectare converter, or read our complete guide to area conversions for every formula in one place.
Frequently asked questions
How many square kilometers are in one hectare?
One hectare equals 0.01 square kilometers. Multiply any hectare value by 0.01 to get square kilometers.
What is 10 hectares in square kilometers?
10 hectares equal 0.1 square kilometers (10 × 0.01).
Is the hectare to square kilometer conversion exact?
The conversion factor used here (0.01) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.