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