**Full name:** millimeter of mercury [0 °C]

**Plural form:** millimeters of mercury

**Symbol:** mmHg

**Alternate spelling:** mm of mercury

**Category type:** pressure

**Scale factor:** 133.32239

The SI derived unit for pressure is the pascal.

1 pascal is equal to 0.0075006156130264 millimeter of mercury.

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

You can use this form to select from known units:

The torr (symbol: Torr) or millimetre of mercury (mmHg) is a non-SI unit of pressure. It is the atmospheric pressure that supports a column of mercury 1 millimetre high. The unit is named after Evangelista Torricelli, Italian physicist and mathematician, for his discovery of the principle of the barometer in 1643.

millimeter of mercury to foot of air [0 °C]

millimeter of mercury to centimeter of mercury [0 °C]

millimeter of mercury to water column [centimeter]

millimeter of mercury to attopascal

millimeter of mercury to kip/square inch

millimeter of mercury to sthene/square metre

millimeter of mercury to barad

millimeter of mercury to technical atmosphere

millimeter of mercury to barye

millimeter of mercury to meter of head