In 1 centiares there are 1,550.0031 square inches. Meanwhile in 1 square inches there are 0.000645 centiares. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Square inches to Centiares calculator above to convert any number.
* Values rounded to 6 decimal places for readability
A centiare (ca) is a metric unit of area equal to 1 square meter (m²). To convert centiares to square inches (in²), convert m² to in².
Conversion factor
Formula
Quick examples
Tip: Keep 1 ca = 1 m² in mind, then use the m² to square inches factor for accurate centiare to square inches conversion.
A centiare is a metric unit of area. It equals 1 square meter (m²). Since it’s 1/100 of an are, it often shows up in land and garden measurements.
1 centiare equals 1,550.0031 square inches (in²).
This comes from 1 centiare = 1 m², and 1 m² = 1,550.0031 in².
Use this formula to convert centiares to square inches:
square inches = centiares × 1,550.0031
For most daily uses, rounding to 1,550 in² per centiare is close enough.
Example: 3 ca × 1,550.0031 = 4,650.0093 in².
“Centiare” breaks down into “cent” (one hundredth) and “are.” One are is 100 m².
So 1/100 of 100 m² equals 1 m², which is 1 centiare.
1 square inch equals 0.00064516 centiares.
Formula: centiares = square inches ÷ 1,550.0031
This is useful when you need to switch from small inch-based areas to metric land units.
Here are some quick reference values:
To convert in the other direction, divide by 1,550.0031:
centiares = square inches ÷ 1,550.0031
Example: 3,100 in² ÷ 1,550.0031 ≈ 2.0000 ca.
There are 1,550.0031 square inches in 1 square meter.
Since 1 centiare equals 1 m², this is the same conversion factor.
Yes, you can round based on your needs:
If you’re measuring materials with tight tolerances, use more decimal places.
Both measure area, but they are very different sizes:
If you’re working with land size, hectares are common. For smaller plots, centiares feel more practical.
This conversion helps when you have metric land or garden measurements in centiares but need results in square inches for inch-based plans. It can also help with small surface areas when you want fine detail in imperial units.
The Calculate Box tool to convert centiares to square inches 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 inches.