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


›› More information from the unit converter

How many inHg 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:
inHg or millihg
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inHg, 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 inHg to millihg

1 inHg to millihg = 25.4 millihg

2 inHg to millihg = 50.8 millihg

3 inHg to millihg = 76.2 millihg

4 inHg to millihg = 101.6 millihg

5 inHg to millihg = 127 millihg

6 inHg to millihg = 152.4 millihg

7 inHg to millihg = 177.8 millihg

8 inHg to millihg = 203.2 millihg

9 inHg to millihg = 228.6 millihg

10 inHg to millihg = 254 millihg

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

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›› Common pressure conversions

inHg to pascal
inHg to technical atmosphere
inHg to exapascal
inHg to kilogram/square centimeter
inHg to picopascal
inHg to centimeter water
inHg to inch mercury
inHg to kilobar
inHg to dekapascal
inHg to millimeter of 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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