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How many pound/square inch [absolute] in 1 inch mercury?
The answer is 0.49115420057253.

We assume you are converting between **pound/square inch [absolute]** and .

You can view more details on each measurement unit:

pound/square inch [absolute] or
inch mercury

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.00014503773800722 pound/square inch [absolute], or 0.00029529980164712 inch mercury.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between pounds/square inch and inches mercury.

Type in your own numbers in the form to convert the units!

1 pound/square inch [absolute] to inch mercury = 2.03602 inch mercury

5 pound/square inch [absolute] to inch mercury = 10.1801 inch mercury

10 pound/square inch [absolute] to inch mercury = 20.3602 inch mercury

15 pound/square inch [absolute] to inch mercury = 30.54031 inch mercury

20 pound/square inch [absolute] to inch mercury = 40.72041 inch mercury

25 pound/square inch [absolute] to inch mercury = 50.90051 inch mercury

30 pound/square inch [absolute] to inch mercury = 61.08061 inch mercury

40 pound/square inch [absolute] to inch mercury = 81.44082 inch mercury

50 pound/square inch [absolute] to inch mercury = 101.80102 inch mercury

You can do the reverse unit conversion from inch mercury to pound/square inch [absolute], or enter any two units below:

pound/square inch [absolute] to centimeter mercury

pound/square inch [absolute] to ton/square inch

pound/square inch [absolute] to millimeter water

pound/square inch [absolute] to inch of water

pound/square inch [absolute] to nanopascal

pound/square inch [absolute] to centihg

pound/square inch [absolute] to millimeter of water

pound/square inch [absolute] to pascal

pound/square inch [absolute] to femtopascal

pound/square inch [absolute] to millipascal

Pounds per square inch absolute (psia) is used to make it clear that the pressure is relative to a vacuum rather than the ambient atmospheric pressure. Since atmospheric pressure at sea level is around 14.7 psi, this will be added to any pressure reading made in air at sea level.

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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