**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 atmosphere [standard]

millimeter of mercury to water column [centimeter]

millimeter of mercury to kilogram/square centimetre

millimeter of mercury to decitorr

millimeter of mercury to pound/square inch [absolute]

millimeter of mercury to megapascal

millimeter of mercury to foot mercury [0 °C]

millimeter of mercury to meter of air [15 °C]

millimeter of mercury to centipascal

millimeter of mercury to kip/square foot