How many inch mercury in 1 inches 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 inches water column The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch mercury, or 0.0040146307866177 inches 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 inches water column = 13.5951 inches water column
2 inch mercury to inches water column = 27.1902 inches water column
3 inch mercury to inches water column = 40.7853 inches water column
4 inch mercury to inches water column = 54.38041 inches water column
5 inch mercury to inches water column = 67.97551 inches water column
6 inch mercury to inches water column = 81.57061 inches water column
7 inch mercury to inches water column = 95.16571 inches water column
8 inch mercury to inches water column = 108.76081 inches water column
9 inch mercury to inches water column = 122.35591 inches water column
10 inch mercury to inches water column = 135.95102 inches water column
You can do the reverse unit conversion from inches 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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