›› Measurement unit: millimeter of mercury

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


›› SI unit: pascal

The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0075006156130264 millimeter of mercury.


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›› Definition: Millimeter of mercury

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.


›› Sample conversions: millimeter of mercury

millimeter of mercury to millihg
millimeter of mercury to microbar
millimeter of mercury to nanopascal
millimeter of mercury to foot of air [15 °C]
millimeter of mercury to hectopascal
millimeter of mercury to micropascal
millimeter of mercury to kilogram-force/square millimetre
millimeter of mercury to kilopond/square millimeter
millimeter of mercury to megabar
millimeter of mercury to ton/square metre