›› Measurement unit: mm Hg

Full name: millimeter mercury [0 C]

Plural form: millimeters mercury

Symbol: mm Hg

Alternate spelling: mm 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 0.00750061561303 mm Hg.


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›› Definition: Millimeter 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: mm Hg

mm Hg to kilogram/square centimetre
mm Hg to foot of air [15 C]
mm Hg to inch of air [15 C]
mm Hg to zeptopascal
mm Hg to petapascal
mm Hg to exapascal
mm Hg to meter of air [0 C]
mm Hg to millimeter of water [4 C]
mm Hg to kilopond/square centimetre
mm Hg to centimeter of water [4 C]