Mercury (Hg) is 13.59 times as dense as water, so 1 mm Hg pressure equals 13.59 mm H2O pressure. Expressed otherwise, 1 mmHg equals 1.359 cm H2O pressure (as H2O pressure is usually expressed in cm). Water is defined with a density of 1, if you're wondering. Two inches of water equals 5.08 cm, which equals 3.74 mmHg pressure. Eddie Brian -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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