›› Convert hectopascal to

inch mercury

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How many hectopascal in 1 inch mercury? The answer is 33.86389.
We assume you are converting between hectopascal and .
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hectopascal or inch mercury
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.01 hectopascal, or 0.00029529980164712 inch mercury.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between hectopascals and inches mercury.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of hectopascal to inch mercury

1 hectopascal to inch mercury = 0.02953 inch mercury

10 hectopascal to inch mercury = 0.2953 inch mercury

20 hectopascal to inch mercury = 0.5906 inch mercury

30 hectopascal to inch mercury = 0.8859 inch mercury

40 hectopascal to inch mercury = 1.1812 inch mercury

50 hectopascal to inch mercury = 1.4765 inch mercury

100 hectopascal to inch mercury = 2.953 inch mercury

200 hectopascal to inch mercury = 5.906 inch mercury

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

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›› Common pressure conversions

hectopascal to foot of mercury
hectopascal to attobar
hectopascal to ton/square foot
hectopascal to kilogram-force/square millimeter
hectopascal to millipascal
hectopascal to micron of mercury
hectopascal to megabar
hectopascal to microbar
hectopascal to foot of water
hectopascal to zettabar

›› Definition: Hectopascal

The SI prefix "hecto" represents a factor of 102, or in exponential notation, 1E2.

So 1 hectopascal = 102 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.

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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