In 1 acres there are 4,046.856422 centiares. Meanwhile in 1 centiares there are 0.000247 acres. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Centiares to Acres calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert acres to centiares (ca), use the metric link between area units.
Formula:
centiares = acres × 4,046.8564224
Quick examples:
Tip: For fast estimates, round to 1 acre ≈ 4,047 centiares.
An acre is a unit of land area used in the US, UK, and other places. It equals 43,560 square feet or about 4,046.856 square meters. Acres are common for farms, lots, and large land plots.
A centiare, often written as ca, is a metric unit of area. It equals 1 square meter. It’s part of the are-based system where 1 are equals 100 square meters.
1 acre = 4,046.8564224 centiares (m²).
Since 1 centiare equals 1 m², the acre-to-centiare conversion matches acre-to-square-meter.
Use this simple formula:
centiares = acres × 4,046.8564224
Use the reverse formula:
acres = centiares ÷ 4,046.8564224
A centiare is defined as 1 square meter. So converting acres to centiares is the same as converting acres to square meters. The number stays the same because the unit size is the same.
No. They’re related, but not the same size.
Here are a few quick conversions people use often:
Rounded to a whole number:
1 acre ≈ 4,047 centiares
Rounded to 2 decimals:
1 acre = 4,046.86 centiares
Centiares work well when you need metric land area in square meters. They fit surveys, site plans, and property details in countries that use metric units. Acres are more common in places that use imperial and US customary units.
No. The conversion is fixed because both units have exact definitions. An acre always converts to the same number of square meters (and centiares), no matter where you are.
Sometimes. Many land records use square meters or hectares, which are more common. Since 1 centiare equals 1 m², centiares may appear in older documents or in places that still use are-based units.
Write the unit next to every number and keep the conversion factor consistent:
1 acre = 4,046.8564224 ca
Round only at the end, especially for legal or survey work.
The Calculate Box tool to convert acres to centiares uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a acres value in the box and have it instantly converted to centiares.