How many ounce/square inch in 1 in Hg? The answer is 7.8584672091604. We assume you are converting between ounce/square inch and inch mercury [0 °C]. You can view more details on each measurement unit: ounce/square inch or in Hg The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.0023206038081155 ounce/square inch, or 0.00029529980164712 in Hg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between ounces/square inch and inches mercury. Type in your own numbers in the form to convert the units!
1 ounce/square inch to in Hg = 0.12725 in Hg
5 ounce/square inch to in Hg = 0.63626 in Hg
10 ounce/square inch to in Hg = 1.27251 in Hg
20 ounce/square inch to in Hg = 2.54503 in Hg
30 ounce/square inch to in Hg = 3.81754 in Hg
40 ounce/square inch to in Hg = 5.09005 in Hg
50 ounce/square inch to in Hg = 6.36256 in Hg
75 ounce/square inch to in Hg = 9.54385 in Hg
100 ounce/square inch to in Hg = 12.72513 in Hg
You can do the reverse unit conversion from in Hg to ounce/square inch, 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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