In 1 centiares there are 0.00000100000 square kilometer. Meanwhile in 1 square kilometer there are 1,000,000 centiares. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Square kilometer to Centiares calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert centiares (ca) to square kilometers (km²), use the fact that 1 centiare = 1 square meter (m²). Then convert square meters to square kilometers.
Key conversions
Formula
Quick examples
Tip: If you’re converting land area, keep units clear, ca for smaller plots and km² for large regions.
A centiare is a metric unit of area equal to 1 square meter (1 m²). It’s often used for small land areas, like garden plots. The symbol is ca.
A square kilometer is a metric unit of area equal to 1,000,000 square meters (1,000,000 m²). It’s common for large areas, like cities, forests, or regions. The symbol is km².
To convert centiares to square kilometers, use this relationship:
Use a simple divide-by rule:
This works because 1 km² contains 1,000,000 m², and 1 centiare equals 1 m².
The standard formula is:
You can also write it as:
There are 1,000,000 centiares in 1 square kilometer.
Here are common conversions:
A centiare is only 1 m². A square kilometer is 1,000,000 m². That big size gap makes the km² result very small when you convert from centiares.
Yes. They are equal in area.
This makes conversions easier since you can convert ca to m² first, if you want.
You can do it in two steps:
Write the conversion factor once and stick to it:
Then check your result. If you start with a small land area, your km² should be a small decimal.
Centiares fit small areas, like:
Square kilometers fit large areas, like:
The Calculate Box tool to convert centiares to square kilometer uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a centiares value in the box and have it instantly converted to square kilometer.