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"mm Hg" stands for millimetres of Mercury. Atmospheric pressure was measured in terms of the height of a column of mercury that it could support and by extension, mm Hg became a unit for measuring pressure.

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6y ago
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7y ago

1 mm Hg is a pressure. It is equal to 0.0013 atmospheres of pressure, or it's equal to 133.32 Pascals of pressure. Put another way that is more familiar to the lay public, it is equal to about 0.019 pounds per square inch (psi), or it takes about 52 mm Hg to equal 1 psi.

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7y ago

1 mm mercury is equal to 133,322 387 415 pascals.

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