How many foot of head in 1 inch Hg? The answer is 1.1332151194584. We assume you are converting between foot of head and inch of mercury [0 °C]. You can view more details on each measurement unit: foot of head or inch Hg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00033463823293911 foot of head, 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 feet of head and inches of mercury. Type in your own numbers in the form to convert the units!
1 foot of head to inch Hg = 0.88244 inch Hg
5 foot of head to inch Hg = 4.41222 inch Hg
10 foot of head to inch Hg = 8.82445 inch Hg
20 foot of head to inch Hg = 17.6489 inch Hg
30 foot of head to inch Hg = 26.47335 inch Hg
40 foot of head to inch Hg = 35.2978 inch Hg
50 foot of head to inch Hg = 44.12225 inch Hg
75 foot of head to inch Hg = 66.18337 inch Hg
100 foot of head to inch Hg = 88.2445 inch Hg
You can do the reverse unit conversion from inch Hg to foot of head, 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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