How many centimeter mercury in 1 inch mercury?
The answer is 2.5400002205181.

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

You can view more details on each measurement unit:

centimeter mercury or
inch mercury

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

1 pascal is equal to 0.00075006156130264 centimeter mercury, or 0.00029529980164712 inch 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 mercury.

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

1 centimeter mercury to inch mercury = 0.3937 inch mercury

5 centimeter mercury to inch mercury = 1.9685 inch mercury

10 centimeter mercury to inch mercury = 3.93701 inch mercury

20 centimeter mercury to inch mercury = 7.87402 inch mercury

30 centimeter mercury to inch mercury = 11.81102 inch mercury

40 centimeter mercury to inch mercury = 15.74803 inch mercury

50 centimeter mercury to inch mercury = 19.68504 inch mercury

75 centimeter mercury to inch mercury = 29.52756 inch mercury

100 centimeter mercury to inch mercury = 39.37008 inch mercury

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

centimeter mercury to meganewton/square meter

centimeter mercury to kilogram-force/square meter

centimeter mercury to yoctobar

centimeter mercury to yottabar

centimeter mercury to zettabar

centimeter mercury to water column

centimeter mercury to microbar

centimeter mercury to gigapascal

centimeter mercury to nanopascal

centimeter mercury to centibar

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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