›› Convert inch of mercury [0 C] to inch of water column


inch of mercury
inch water column

›› More information from the unit converter

How many inch of mercury in 1 inch water column? The answer is 0.073555912463681.
We assume you are converting between inch of mercury [0 C] and inch of water column.
You can view more details on each measurement unit:
inch of mercury or inch water column
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inch of mercury, or 0.0040146307866177 inch water column.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches of mercury and inches water column.
Type in your own numbers in the form to convert the units!


›› Quick conversion chart of inch of mercury to inch water column

1 inch of mercury to inch water column = 13.5951 inch water column

2 inch of mercury to inch water column = 27.1902 inch water column

3 inch of mercury to inch water column = 40.7853 inch water column

4 inch of mercury to inch water column = 54.3804 inch water column

5 inch of mercury to inch water column = 67.9755 inch water column

6 inch of mercury to inch water column = 81.5706 inch water column

7 inch of mercury to inch water column = 95.1657 inch water column

8 inch of mercury to inch water column = 108.7608 inch water column

9 inch of mercury to inch water column = 122.3559 inch water column

10 inch of mercury to inch water column = 135.951 inch water column


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

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›› Common pressure conversions

inch of mercury to kilopascal
inch of mercury to kilogram-force/square millimeter
inch of mercury to poundal/square foot
inch of mercury to picobar
inch of mercury to kilopond/square meter
inch of mercury to picopascal
inch of mercury to inch mercury
inch of mercury to atmosphere
inch of mercury to inch of air
inch of mercury to foot 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.


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ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!