›› Convert to decibar

inch mercury

›› More information from the unit converter

How many inch mercury in 1 decibar? The answer is 2.9529980164712.
We assume you are converting between and decibar.
You can view more details on each measurement unit:
inch mercury or decibar
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529980164712 inch mercury, or 0.0001 decibar.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches mercury and decibars.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch mercury to decibar

1 inch mercury to decibar = 0.33864 decibar

5 inch mercury to decibar = 1.69319 decibar

10 inch mercury to decibar = 3.38639 decibar

20 inch mercury to decibar = 6.77278 decibar

30 inch mercury to decibar = 10.15917 decibar

40 inch mercury to decibar = 13.54556 decibar

50 inch mercury to decibar = 16.93195 decibar

75 inch mercury to decibar = 25.39792 decibar

100 inch mercury to decibar = 33.86389 decibar

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

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›› Common pressure conversions

inch mercury to foot mercury
inch mercury to newton/square meter
inch mercury to microbar
inch mercury to petabar
inch mercury to megapascal
inch mercury to exabar
inch mercury to kilopond/square centimeter
inch mercury to kilonewton/square meter
inch mercury to meganewton/square meter
inch mercury to attopascal

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

›› Definition: Decibar

The SI prefix "deci" represents a factor of 10-1, or in exponential notation, 1E-1.

So 1 decibar = 10-1 bars.

The definition of a bar is as follows:

The bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). The word bar is of Greek origin, báros meaning weight. Its official symbol is "bar"; the earlier "b" is now deprecated, but still often seen especially as "mb" rather than the proper "mbar" for millibars.

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