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

inch water column

›› More information from the unit converter

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

1 inHg to inch water column = 13.5951 inch water column

2 inHg to inch water column = 27.1902 inch water column

3 inHg to inch water column = 40.7853 inch water column

4 inHg to inch water column = 54.3804 inch water column

5 inHg to inch water column = 67.9755 inch water column

6 inHg to inch water column = 81.5706 inch water column

7 inHg to inch water column = 95.1657 inch water column

8 inHg to inch water column = 108.7608 inch water column

9 inHg to inch water column = 122.3559 inch water column

10 inHg 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 inHg, or enter any two units below:

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›› Common pressure conversions

inHg to torr
inHg to meganewton/square meter
inHg to inch mercury
inHg to decibar
inHg to centibar
inHg to nanopascal
inHg to zeptobar
inHg to inch water
inHg to pound/square foot
inHg to ton/square foot

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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