How many inch mercury in 1 millimegapascal? The answer is 0.29529980164712. We assume you are converting between inch mercury [0 °C] and millimegapascal. You can view more details on each measurement unit: inch mercury or millimegapascal The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch 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 mercury and millimegapascals. Type in your own numbers in the form to convert the units!
1 inch mercury to millimegapascal = 3.38639 millimegapascal
5 inch mercury to millimegapascal = 16.93195 millimegapascal
10 inch mercury to millimegapascal = 33.86389 millimegapascal
15 inch mercury to millimegapascal = 50.79584 millimegapascal
20 inch mercury to millimegapascal = 67.72778 millimegapascal
25 inch mercury to millimegapascal = 84.65973 millimegapascal
30 inch mercury to millimegapascal = 101.59167 millimegapascal
40 inch mercury to millimegapascal = 135.45556 millimegapascal
50 inch mercury to millimegapascal = 169.31945 millimegapascal
You can do the reverse unit conversion from millimegapascal 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.
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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