How many inch mercury in 1 inch of water column? The answer is 0.073555905223332. We assume you are converting between inch mercury [0 °C] and inch of water column. You can view more details on each measurement unit: inch mercury or inch of water column The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch mercury, or 0.0040146307866177 inch of water column. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches mercury and inches water column. Type in your own numbers in the form to convert the units!
1 inch mercury to inch of water column = 13.5951 inch of water column
2 inch mercury to inch of water column = 27.1902 inch of water column
3 inch mercury to inch of water column = 40.7853 inch of water column
4 inch mercury to inch of water column = 54.38041 inch of water column
5 inch mercury to inch of water column = 67.97551 inch of water column
6 inch mercury to inch of water column = 81.57061 inch of water column
7 inch mercury to inch of water column = 95.16571 inch of water column
8 inch mercury to inch of water column = 108.76081 inch of water column
9 inch mercury to inch of water column = 122.35591 inch of water column
10 inch mercury to inch of water column = 135.95102 inch of water column
You can do the reverse unit conversion from inch of water column to inch 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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