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mm Hg means mm of Mercury (Hg comes from Hydrargyrum, Greek for watery silver(compare quicksilver), and the symbol for mercury). This represents the pressure that the height of a mercury column gives. Static pressure is defined as density x gravitational constant (approx. 9.81) x height of column.

The density of mercury is 13.55 g/cm3.

If the height of mercury is 760 mm, the pressure would be:

760 mmHg

or

9.81x760x13.55=101023.38 N/m2 or 1010.23 mbar

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15y ago

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