**Centimetre of water** is a subdivision of the

**metre of water** unit. The

**centi** prefix stands for 0.01 therefore, 1 centimetre of water = 0.01 metre of water units.

**Metre of water** is a unit of measurement of pressure or mechanical stress. The definition for metre of water is the following:

A centimetre of water is approximately equal to 999.972 kg/m^{3} × 1 cm × *g*.

The symbol for centimetre of water is

**cmH**_{2}OCentimetre of water is compatible with the

pascal base unit.

*Please note: The equivalent value of centimetre of water in SI units is an approximation.*