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!

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

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

inch of mercury to foot mercury

inch of mercury to megapascal

inch of mercury to meter of head

inch of mercury to foot water

inch of mercury to technical atmosphere

inch of mercury to foot of air

inch of mercury to micron of mercury

inch of mercury to barad

inch of mercury to exabar

inch of mercury to millibar

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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