Convert hectopascal to inch of mercury [0 °C]


More information from the unit converter

How many hpa in 1 inhg? The answer is 33.863886666667. We assume you are converting between hectopascal and inch of mercury [0 °C]. You can view more details on each measurement unit: hpa or inhg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.01 hpa, or 0.00029529983071445 inhg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between hectopascals and inches of mercury. Type in your own numbers in the form to convert the units!

Quick conversion chart of hpa to inhg

1 hpa to inhg = 0.02953 inhg

10 hpa to inhg = 0.2953 inhg

20 hpa to inhg = 0.5906 inhg

30 hpa to inhg = 0.8859 inhg

40 hpa to inhg = 1.1812 inhg

50 hpa to inhg = 1.4765 inhg

100 hpa to inhg = 2.953 inhg

200 hpa to inhg = 5.906 inhg

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Common pressure conversions

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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