How many millibar in 1 inches Hg? The answer is 33.86389. We assume you are converting between millibar and inch mercury [0 °C]. You can view more details on each measurement unit: millibar or inches Hg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.01 millibar, or 0.00029529980164712 inches Hg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millibars and inches mercury. Type in your own numbers in the form to convert the units!
1 millibar to inches Hg = 0.02953 inches Hg
10 millibar to inches Hg = 0.2953 inches Hg
20 millibar to inches Hg = 0.5906 inches Hg
30 millibar to inches Hg = 0.8859 inches Hg
40 millibar to inches Hg = 1.1812 inches Hg
50 millibar to inches Hg = 1.4765 inches Hg
100 millibar to inches Hg = 2.953 inches Hg
200 millibar to inches Hg = 5.906 inches Hg
You can do the reverse unit conversion from inches Hg to millibar, or enter any two units below:
A millibar (mb) is 1/1000th of a bar, a unit for measurement of pressure. It is not an SI unit of measure, however it is one of the units used in meteorology when describing atmospheric pressure. The SI unit is the pascal (Pa), with 1 millibar = 100 pascals (a hectopascal)
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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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