How many foot of water in 1 inHg? The answer is 1.1329250163878. We assume you are converting between foot of water [4 °C] and inch of mercury [0 °C]. You can view more details on each measurement unit: foot of water or inHg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00033455256555148 foot of water, or 0.00029529983071445 inHg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between feet of water and inches of mercury. Type in your own numbers in the form to convert the units!
1 foot of water to inHg = 0.88267 inHg
5 foot of water to inHg = 4.41335 inHg
10 foot of water to inHg = 8.82671 inHg
20 foot of water to inHg = 17.65342 inHg
30 foot of water to inHg = 26.48013 inHg
40 foot of water to inHg = 35.30684 inHg
50 foot of water to inHg = 44.13355 inHg
75 foot of water to inHg = 66.20032 inHg
100 foot of water to inHg = 88.26709 inHg
You can do the reverse unit conversion from inHg to foot of water, 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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