›› Convert inch of mercury [0 °C] to millihg

inch of mercury

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How many inch of mercury in 1 millihg? The answer is 0.039370079197446.
We assume you are converting between inch of mercury [0 °C] and millihg.
You can view more details on each measurement unit:
inch of mercury or millihg
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inch of mercury, or 0.0075006156130264 millihg.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches of mercury and millihg.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch of mercury to millihg

1 inch of mercury to millihg = 25.4 millihg

2 inch of mercury to millihg = 50.8 millihg

3 inch of mercury to millihg = 76.2 millihg

4 inch of mercury to millihg = 101.6 millihg

5 inch of mercury to millihg = 127 millihg

6 inch of mercury to millihg = 152.4 millihg

7 inch of mercury to millihg = 177.8 millihg

8 inch of mercury to millihg = 203.2 millihg

9 inch of mercury to millihg = 228.6 millihg

10 inch of mercury to millihg = 254 millihg

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

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›› Common pressure conversions

inch of mercury to centihg
inch of mercury to inch mercury
inch of mercury to centimeter mercury
inch of mercury to kilopascal
inch of mercury to gram/square centimeter
inch of mercury to newton/square millimeter
inch of mercury to hectobar
inch of mercury to water column
inch of mercury to micrometer of mercury
inch of mercury to micron mercury

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 millihg = 10-3 hg.

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