In 1 square inches there are 0.000645 centiares. Meanwhile in 1 centiares there are 1,550.0031 square inches. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Centiares to Square inches calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert square inches (in²) to centiares (ca), use a fixed area link: 1 centiare = 1 square meter (m²), and 1 m² = 1,550.0031 in².
Conversion formula (in² to ca):
Quick example:
This square inches to centiares conversion works for any surface area, like countertops, flooring, or fabric.
A centiare is a metric unit of area. It equals 1 square meter (1 m²). Since 100 centiares make 1 are, a centiare is also 1/100 of an are.
A square inch is a unit of area in the US customary and Imperial systems. It measures the area of a 1-inch by 1-inch square.
Use this formula:
centiares = square inches × 0.00064516
This works because 1 square inch equals 0.00064516 square meters, and 1 centiare equals 1 square meter.
The conversion factor is:
1 in² = 0.00064516 ca
To convert, multiply square inches by 0.00064516.
Since 1 centiare equals 1 square meter, and 1 square meter equals about 1,550.0031 square inches:
1 ca = 1,550.0031 in² (about)
A centiare is defined as 1 square meter by design. The name comes from being 1/100 of an are, and 1 are equals 100 square meters.
Yes, but it adds steps. You can go:
Direct conversion is simpler and reduces rounding.
Square inches often show up in small surfaces, like paper, screens, tiles, and parts. Centiares (square meters) fit better for floors, rooms, and land plots where metric area is used.
For a quick estimate:
It’s a rough method, but it helps for fast checks.
It’s a very small amount:
1 in² = 0.00064516 ca
That’s less than one-thousandth of a centiare.
No. Area units convert the same way no matter the shape. A rectangle, circle, or odd outline with the same area in square inches will convert to the same area in centiares.
It depends on your use:
The Calculate Box tool to convert square inches to centiares uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a square inches value in the box and have it instantly converted to centiares.