How many inch of mercury in 1 inch mercury?
The answer is 1.0000000984333.

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

You can view more details on each measurement unit:

inch of mercury or
inch mercury

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

1 pascal is equal to 0.00029529983071445 inch of mercury, 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 inches of mercury and inches mercury.

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

1 inch of mercury to inch mercury = 1 inch mercury

5 inch of mercury to inch mercury = 5 inch mercury

10 inch of mercury to inch mercury = 10 inch mercury

20 inch of mercury to inch mercury = 20 inch mercury

30 inch of mercury to inch mercury = 30 inch mercury

40 inch of mercury to inch mercury = 40 inch mercury

50 inch of mercury to inch mercury = 50 inch mercury

75 inch of mercury to inch mercury = 74.99999 inch mercury

100 inch of mercury to inch mercury = 99.99999 inch mercury

You can do the reverse unit conversion from inch mercury to inch of mercury, or enter any two units below:

inch of mercury to attobar

inch of mercury to kip/square foot

inch of mercury to atmosphere

inch of mercury to femtopascal

inch of mercury to gram/square centimeter

inch of mercury to millipascal

inch of mercury to kilopond/square centimeter

inch of mercury to centitorr

inch of mercury to micron of mercury

inch of mercury to newton/square millimeter

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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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