How many centimeter of mercury in 1 inch Hg? The answer is 2.5399999704976. We assume you are converting between centimeter of mercury [0 °C] and inch of mercury [0 °C]. You can view more details on each measurement unit: centimeter of mercury or inch Hg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00075006156130264 centimeter of mercury, or 0.00029529983071445 inch Hg. 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 of mercury. Type in your own numbers in the form to convert the units!
1 centimeter of mercury to inch Hg = 0.3937 inch Hg
5 centimeter of mercury to inch Hg = 1.9685 inch Hg
10 centimeter of mercury to inch Hg = 3.93701 inch Hg
20 centimeter of mercury to inch Hg = 7.87402 inch Hg
30 centimeter of mercury to inch Hg = 11.81102 inch Hg
40 centimeter of mercury to inch Hg = 15.74803 inch Hg
50 centimeter of mercury to inch Hg = 19.68504 inch Hg
75 centimeter of mercury to inch Hg = 29.52756 inch Hg
100 centimeter of mercury to inch Hg = 39.37008 inch Hg
You can do the reverse unit conversion from inch Hg to centimeter of mercury, or enter any two units below:
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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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