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


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›› More information from the unit converter

How many inch of mercury in 1 water column? The answer is 0.028959020848759.
We assume you are converting between inch of mercury [0 C] and water column [centimeter].
You can view more details on each measurement unit:
inch of mercury or water column
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inch of mercury, or 0.010197162129779 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 water column.
Type in your own numbers in the form to convert the units!


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

1 inch of mercury to water column = 34.53155 water column

2 inch of mercury to water column = 69.06311 water column

3 inch of mercury to water column = 103.59466 water column

4 inch of mercury to water column = 138.12622 water column

5 inch of mercury to water column = 172.65777 water column

6 inch of mercury to water column = 207.18933 water column

7 inch of mercury to water column = 241.72088 water column

8 inch of mercury to water column = 276.25243 water column

9 inch of mercury to water column = 310.78399 water column

10 inch of mercury to water column = 345.31554 water column


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›› Common pressure conversions

inch of mercury to hectopascal
inch of mercury to nanopascal
inch of mercury to attopascal
inch of mercury to megapascal
inch of mercury to nanobar
inch of mercury to pound/square inch
inch of mercury to ton/square meter
inch of mercury to yoctopascal
inch of mercury to ton/square inch
inch of mercury to decibar


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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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