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atmosphere [standard] atmosphere [technical] |
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inch mercury |

How many atmosphere [standard] in 1 inch mercury?
The answer is 0.03342105764411.

We assume you are converting between **atmosphere [standard]** and .

You can view more details on each measurement unit:

atmosphere [standard] or
inch mercury

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

1 pascal is equal to 9.8692316931427E-6 atmosphere [standard], 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 atmospheres and inches mercury.

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

1 atmosphere [standard] to inch mercury = 29.92126 inch mercury

2 atmosphere [standard] to inch mercury = 59.84251 inch mercury

3 atmosphere [standard] to inch mercury = 89.76377 inch mercury

4 atmosphere [standard] to inch mercury = 119.68502 inch mercury

5 atmosphere [standard] to inch mercury = 149.60628 inch mercury

6 atmosphere [standard] to inch mercury = 179.52753 inch mercury

7 atmosphere [standard] to inch mercury = 209.44879 inch mercury

8 atmosphere [standard] to inch mercury = 239.37004 inch mercury

9 atmosphere [standard] to inch mercury = 269.2913 inch mercury

10 atmosphere [standard] to inch mercury = 299.21255 inch mercury

You can do the reverse unit conversion from inch mercury to atmosphere [standard], or enter any two units below:

atmosphere [standard] to kilogram-force/square millimeter

atmosphere [standard] to micrometer of water

atmosphere [standard] to micron mercury

atmosphere [standard] to kilobar

atmosphere [standard] to centimeter of mercury

atmosphere [standard] to foot of water

atmosphere [standard] to dekapascal

atmosphere [standard] to inch water column

atmosphere [standard] to kilonewton/square meter

atmosphere [standard] to centitorr

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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