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How many pound/square inch [absolute] in 1 inch of mercury?
The answer is 0.49115415222661.

We assume you are converting between **pound/square inch [absolute]** and **inch of mercury [0 °C]**.

You can view more details on each measurement unit:

pound/square inch [absolute] or
inch of mercury

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

1 pascal is equal to 0.00014503773800722 pound/square inch [absolute], or 0.00029529983071445 inch of 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 of mercury.

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

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

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

10 pound/square inch [absolute] to inch of mercury = 20.36021 inch of mercury

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

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

25 pound/square inch [absolute] to inch of mercury = 50.90052 inch of mercury

30 pound/square inch [absolute] to inch of mercury = 61.08062 inch of mercury

40 pound/square inch [absolute] to inch of mercury = 81.44083 inch of mercury

50 pound/square inch [absolute] to inch of mercury = 101.80103 inch of mercury

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

pound/square inch [absolute] to inch water column

pound/square inch [absolute] to yottabar

pound/square inch [absolute] to atmosphere

pound/square inch [absolute] to petabar

pound/square inch [absolute] to yottapascal

pound/square inch [absolute] to millimeter of water

pound/square inch [absolute] to meter of air

pound/square inch [absolute] to kilogram-force/square millimeter

pound/square inch [absolute] to femtopascal

pound/square inch [absolute] to centimeter of mercury

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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