A centiare (symbol ca) is a unit of area, equal to 1 square meter, used in some countries for measuring small land areas, usually in combination with ares, e.g. 1a 16ca = 116 m². Though its base unit, the are, was defined by older forms of the metric system, it is not part of the modern metric system, the International System (SI). It is accepted, but not encouraged, for use with the SI.
1 centiare = 0.01 ares = 1 square metre = 1 m² = 1 m × 1 m.
One can write : 1a 16ca for an area of 116m² (ie 1 × 100 m² + 16 × 1 m²)
centare in French: Centiare
centare in Italian: Centiara
centare in Dutch: Centiare