Square Kilometres to Hectares Converter
Convert square kilometres to hectares — one hundred hectares to the square kilometre. Results update as you type; exact factors shown.
One square kilometre is 100 hectares — see the exact factor, not a rounded rule of thumb.
How the square kilometres to hectares converter works
Areas convert through the square metre. Because the inch is exactly 25.4 mm, a square foot is exactly 0.09290304 m², an acre (43,560 square feet) is exactly 4,046.8564224 m² and a square mile (640 acres) is 2,589,988.110336 m². A hectare is 10,000 m² by definition.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common area conversions
| From | To | Units |
|---|---|---|
| 0.01 km² | 1 ha | square kilometres to hectares |
| 0.1 km² | 10 ha | square kilometres to hectares |
| 0.25 km² | 25 ha | square kilometres to hectares |
| 0.5 km² | 50 ha | square kilometres to hectares |
| 1 km² | 100 ha | square kilometre to hectares |
| 2 km² | 200 ha | square kilometres to hectares |
| 5 km² | 500 ha | square kilometres to hectares |
| 10 km² | 1,000 ha | square kilometres to hectares |
| 20 km² | 2,000 ha | square kilometres to hectares |
| 50 km² | 5,000 ha | square kilometres to hectares |
| 100 km² | 10,000 ha | square kilometres to hectares |
| 1,000 km² | 100,000 ha | square kilometres to hectares |
Units in this converter and their exact factors
| Unit | Symbol | One unit in square metres |
|---|---|---|
| square millimetre | mm² | 0.000001 square metre |
| square centimetre | cm² | 0.0001 square metre |
| square metre | m² | 1 square metre |
| hectare | ha | 10,000 square metre |
| square kilometre | km² | 1,000,000 square metre |
| square inch | in² | 0.00064516 square metre |
| square foot | ft² | 0.09290304 square metre |
| square yard | yd² | 0.83612736 square metre |
| acre | ac | 4,046.8564224 square metre |
| square mile | mi² | 2,589,988.110336 square metre |
FAQFrequently asked questions about area conversion
How many hectares in a square kilometre?
Exactly 100.
How big is a hectare?
10,000 m² — a square 100 m on a side, or about 2.47 acres.
Why use hectares rather than km²?
Because farms and parcels are usually far smaller than a square kilometre, so hectares give readable numbers.
What is 1 km² in acres?
247.1 acres.
How many football pitches is a hectare?
Between one and two, depending on the pitch.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.