How many centimeter mercury in 1 inch of mercury?
The answer is 2.5399999704976.

We assume you are converting between **centimeter mercury [0 °C]** and **inch of mercury [0 °C]**.

You can view more details on each measurement unit:

centimeter mercury or
inch of mercury

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.00075006156130264 centimeter mercury, or 0.00029529983071445 inch of mercury.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between centimeters mercury and inches of mercury.

Type in your own numbers in the form to convert the units!

1 centimeter mercury to inch of mercury = 0.3937 inch of mercury

5 centimeter mercury to inch of mercury = 1.9685 inch of mercury

10 centimeter mercury to inch of mercury = 3.93701 inch of mercury

20 centimeter mercury to inch of mercury = 7.87402 inch of mercury

30 centimeter mercury to inch of mercury = 11.81102 inch of mercury

40 centimeter mercury to inch of mercury = 15.74803 inch of mercury

50 centimeter mercury to inch of mercury = 19.68504 inch of mercury

75 centimeter mercury to inch of mercury = 29.52756 inch of mercury

100 centimeter mercury to inch of mercury = 39.37008 inch of mercury

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

centimeter mercury to yoctopascal

centimeter mercury to millimeter of water

centimeter mercury to centitorr

centimeter mercury to micron of mercury

centimeter mercury to kip/square inch

centimeter mercury to micron mercury

centimeter mercury to centihg

centimeter mercury to megabar

centimeter mercury to newton/square meter

centimeter mercury to foot of head

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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