About the km² to ha calculation
One square kilometer is exactly 100 hectares, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The usual scale for reporting the area of cities and regions. Exactly 10,000 m², the metric standard for farmland and land registry.
Formula
ha = km² × 100
1 km² = 100 ha
1 ha = 0.01 km²Worked example
To convert 1 km², multiply by 100: 1 × 100 = 100 ha.
Frequently asked questions
How many hectares are in a square kilometer?
There are 100 hectares in one square kilometer. To convert any amount, multiply the number of square kilometers by 100.
How do I convert hectares back to square kilometers?
Divide instead of multiplying, or equivalently multiply by 0.01. One hectare is 0.01 square kilometers.
Is this conversion exact?
Yes. Since the international agreement of 1959, the relationship between square kilometers and hectares is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.
Where is each of these units used?
Square Kilometers: the usual scale for reporting the area of cities and regions. Hectares: exactly 10,000 m², the metric standard for farmland and land registry.
Sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units