How many inch of mercury in 1 decibar?
The answer is 2.9529983071445.

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

You can view more details on each measurement unit:

inch of mercury or
decibar

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

1 pascal is equal to 0.00029529983071445 inch of 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 of mercury and decibars.

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

1 inch of mercury to decibar = 0.33864 decibar

5 inch of mercury to decibar = 1.69319 decibar

10 inch of mercury to decibar = 3.38639 decibar

20 inch of mercury to decibar = 6.77278 decibar

30 inch of mercury to decibar = 10.15917 decibar

40 inch of mercury to decibar = 13.54555 decibar

50 inch of mercury to decibar = 16.93194 decibar

75 inch of mercury to decibar = 25.39792 decibar

100 inch of mercury to decibar = 33.86389 decibar

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

inch of mercury to meter of head

inch of mercury to centihg

inch of mercury to nanobar

inch of mercury to kilopond/square meter

inch of mercury to micron of mercury

inch of mercury to inch water

inch of mercury to pound/square foot

inch of mercury to kilogram-force/square meter

inch of mercury to inch of water

inch of mercury to kilopond/square centimeter

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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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