Convert inch of mercury [0 °C] to hectopascal


More information from the unit converter

How many inhg in 1 hpa? The answer is 0.029529983071445. We assume you are converting between inch of mercury [0 °C] and hectopascal. You can view more details on each measurement unit: inhg or hpa The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529983071445 inhg, or 0.01 hpa. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches of mercury and hectopascals. Type in your own numbers in the form to convert the units!

Quick conversion chart of inhg to hpa

1 inhg to hpa = 33.86389 hpa

2 inhg to hpa = 67.72777 hpa

3 inhg to hpa = 101.59166 hpa

4 inhg to hpa = 135.45555 hpa

5 inhg to hpa = 169.31943 hpa

6 inhg to hpa = 203.18332 hpa

7 inhg to hpa = 237.04721 hpa

8 inhg to hpa = 270.91109 hpa

9 inhg to hpa = 304.77498 hpa

10 inhg to hpa = 338.63887 hpa

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Common pressure conversions

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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.

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