How many inch of mercury in 1 millimegapascal? The answer is 0.29529983071445. We assume you are converting between inch of mercury [0 °C] and millimegapascal. You can view more details on each measurement unit: inch of mercury or millimegapascal The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529983071445 inch of mercury, or 0.001 millimegapascal. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches of mercury and millimegapascals. Type in your own numbers in the form to convert the units!
1 inch of mercury to millimegapascal = 3.38639 millimegapascal
5 inch of mercury to millimegapascal = 16.93194 millimegapascal
10 inch of mercury to millimegapascal = 33.86389 millimegapascal
15 inch of mercury to millimegapascal = 50.79583 millimegapascal
20 inch of mercury to millimegapascal = 67.72777 millimegapascal
25 inch of mercury to millimegapascal = 84.65972 millimegapascal
30 inch of mercury to millimegapascal = 101.59166 millimegapascal
40 inch of mercury to millimegapascal = 135.45555 millimegapascal
50 inch of mercury to millimegapascal = 169.31943 millimegapascal
You can do the reverse unit conversion from millimegapascal to inch of 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 millimegapascal = 10-3 megapascals.
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