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

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

You can view more details on each measurement unit:

centimeters of mercury or
inch mercury

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

1 pascal is equal to 0.00075006156130264 centimeters of 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 of mercury and inches mercury.

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

1 centimeters of mercury to inch mercury = 0.3937 inch mercury

5 centimeters of mercury to inch mercury = 1.9685 inch mercury

10 centimeters of mercury to inch mercury = 3.93701 inch mercury

20 centimeters of mercury to inch mercury = 7.87402 inch mercury

30 centimeters of mercury to inch mercury = 11.81102 inch mercury

40 centimeters of mercury to inch mercury = 15.74803 inch mercury

50 centimeters of mercury to inch mercury = 19.68504 inch mercury

75 centimeters of mercury to inch mercury = 29.52756 inch mercury

100 centimeters of mercury to inch mercury = 39.37008 inch mercury

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

centimeters of mercury to technical atmosphere

centimeters of mercury to kilopond/square millimeter

centimeters of mercury to gigapascal

centimeters of mercury to barye

centimeters of mercury to dekabar

centimeters of mercury to attobar

centimeters of mercury to nanopascal

centimeters of mercury to foot water

centimeters of mercury to sthene/square meter

centimeters of mercury to torr

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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