How many inch water column in 1 inHg? The answer is 13.595100196653. We assume you are converting between inch of water column and inch of mercury [0 °C]. You can view more details on each measurement unit: inch water column or inHg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.0040146307866177 inch water column, or 0.00029529983071445 inHg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches water column and inches of mercury. Type in your own numbers in the form to convert the units!
1 inch water column to inHg = 0.07356 inHg
10 inch water column to inHg = 0.73556 inHg
20 inch water column to inHg = 1.47112 inHg
30 inch water column to inHg = 2.20668 inHg
40 inch water column to inHg = 2.94224 inHg
50 inch water column to inHg = 3.6778 inHg
100 inch water column to inHg = 7.35559 inHg
200 inch water column to inHg = 14.71118 inHg
You can do the reverse unit conversion from inHg to inch water column, 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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