››Convert inch of mercury [0 °C] to atmosphere [standard]

 inHg atmosphere

 Did you mean to convert inHg to atmosphere [standard] atmosphere [technical]

How many inHg in 1 atmosphere? The answer is 29.92125830014.
We assume you are converting between inch of mercury [0 °C] and atmosphere [standard].
You can view more details on each measurement unit:
inHg or atmosphere
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inHg, or 9.8692316931427E-6 atmosphere.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches of mercury and atmospheres.
Type in your own numbers in the form to convert the units!

››Quick conversion chart of inHg to atmosphere

1 inHg to atmosphere = 0.03342 atmosphere

10 inHg to atmosphere = 0.33421 atmosphere

20 inHg to atmosphere = 0.66842 atmosphere

30 inHg to atmosphere = 1.00263 atmosphere

40 inHg to atmosphere = 1.33684 atmosphere

50 inHg to atmosphere = 1.67105 atmosphere

100 inHg to atmosphere = 3.34211 atmosphere

200 inHg to atmosphere = 6.68421 atmosphere

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››Definition: Inch of mercury

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!