**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 mmHg.

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.

mmHg to technical atmosphere

mmHg to centitorr

mmHg to millimeter water [4 °C]

mmHg to atmosphere [standard]

mmHg to water column [millimeter]

mmHg to inch of air [15 °C]

mmHg to pound/square inch [gauge]

mmHg to micropascal

mmHg to millipascal

mmHg to attopascal