How many millibar in 1 in 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 in Hg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.01 millibar, or 0.00029529980164712 in 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 in Hg = 0.02953 in Hg
10 millibar to in Hg = 0.2953 in Hg
20 millibar to in Hg = 0.5906 in Hg
30 millibar to in Hg = 0.8859 in Hg
40 millibar to in Hg = 1.1812 in Hg
50 millibar to in Hg = 1.4765 in Hg
100 millibar to in Hg = 2.953 in Hg
200 millibar to in Hg = 5.906 in Hg
You can do the reverse unit conversion from in 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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