**Full name:** millimeter water [4 °C]

**Plural form:** millimeters water

**Symbol:** mm H2O

**Alternate spelling:** mm water

**Category type:** pressure

**Scale factor:** 9.80665

The SI derived unit for pressure is the pascal.

1 pascal is equal to 0.10197162129779 millimeter water.

Valid units must be of the **pressure** type.

You can use this form to select from known units:

millimeter water to water column [millimeter]

millimeter water to kilonewton/square metre

millimeter water to water column [centimeter]

millimeter water to zettapascal

millimeter water to ton/square foot [short]

millimeter water to hectopascal

millimeter water to barye

millimeter water to atmosphere [standard]

millimeter water to centimeter of water [4 °C]

millimeter water to millimeter of mercury [0 °C]