How many inch mercury in 1 millimicrometer of water [4 °C]? The answer is 2.8959017998228E-9. We assume you are converting between inch mercury [0 °C] and millimicrometer of water [4 °C]. You can view more details on each measurement unit: inch mercury or millimicrometer of water [4 °C] The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch mercury, or 101971.62129779 millimicrometer of water [4 °C]. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches mercury and millimicrometers of water. Type in your own numbers in the form to convert the units!
1 inch mercury to millimicrometer of water [4 °C] = 345315576.67501 millimicrometer of water [4 °C]
2 inch mercury to millimicrometer of water [4 °C] = 690631153.35002 millimicrometer of water [4 °C]
3 inch mercury to millimicrometer of water [4 °C] = 1035946730.025 millimicrometer of water [4 °C]
4 inch mercury to millimicrometer of water [4 °C] = 1381262306.7 millimicrometer of water [4 °C]
5 inch mercury to millimicrometer of water [4 °C] = 1726577883.3751 millimicrometer of water [4 °C]
6 inch mercury to millimicrometer of water [4 °C] = 2071893460.0501 millimicrometer of water [4 °C]
7 inch mercury to millimicrometer of water [4 °C] = 2417209036.7251 millimicrometer of water [4 °C]
8 inch mercury to millimicrometer of water [4 °C] = 2762524613.4001 millimicrometer of water [4 °C]
9 inch mercury to millimicrometer of water [4 °C] = 3107840190.0751 millimicrometer of water [4 °C]
10 inch mercury to millimicrometer of water [4 °C] = 3453155766.7501 millimicrometer of water [4 °C]
You can do the reverse unit conversion from millimicrometer of water [4 °C] to inch mercury, or enter any two units below:
Inches of mercury or inHg is a non-SI unit for pressure. It is still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.
It is defined as the pressure exerted by a column of mercury of 1 inch in height at 32 °F (0 °C) at the standard acceleration of gravity.
1 inHg = 3,386.389 pascals at 0 °C.
Aircraft operating at higher altitudes (above 18,000 feet) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea level pressure, with inches of mercury used in the U.S. and Canada. The resulting altimeter readings are known as flight levels.
Piston engine aircraft with constant-speed propellers also use inHg to measure manifold pressure, which is indicative of engine power produced.
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