›› Convert to megapascal

inch mercury

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How many inch mercury in 1 megapascal? The answer is 295.29980164712.
We assume you are converting between and megapascal.
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inch mercury or megapascal
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529980164712 inch mercury, or 1.0E-6 megapascal.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches mercury and megapascals.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch mercury to megapascal

1 inch mercury to megapascal = 0.00339 megapascal

10 inch mercury to megapascal = 0.03386 megapascal

50 inch mercury to megapascal = 0.16932 megapascal

100 inch mercury to megapascal = 0.33864 megapascal

200 inch mercury to megapascal = 0.67728 megapascal

500 inch mercury to megapascal = 1.69319 megapascal

1000 inch mercury to megapascal = 3.38639 megapascal

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You can do the reverse unit conversion from megapascal to inch mercury, or enter any two units below:

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›› Common pressure conversions

inch mercury to newton/square millimeter
inch mercury to meter of air
inch mercury to nanobar
inch mercury to inch of water
inch mercury to hectopascal
inch mercury to kip/square inch
inch mercury to meter of head
inch mercury to millitorr
inch mercury to kilogram-force/square meter
inch mercury to femtobar

›› Definition: Inch mercury

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.

›› Definition: Megapascal

The SI prefix "mega" represents a factor of 106, or in exponential notation, 1E6.

So 1 megapascal = 106 pascals.

The definition of a pascal is as follows:

The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.

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