How many inches of mercury in 1 millibars?
The answer is 0.029529983071445.

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

You can view more details on each measurement unit:

inches of mercury or
millibars

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

1 pascal is equal to 0.00029529983071445 inches of mercury, or 0.01 millibars.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between inches of mercury and millibars.

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

1 inches of mercury to millibars = 33.86389 millibars

2 inches of mercury to millibars = 67.72777 millibars

3 inches of mercury to millibars = 101.59166 millibars

4 inches of mercury to millibars = 135.45555 millibars

5 inches of mercury to millibars = 169.31943 millibars

6 inches of mercury to millibars = 203.18332 millibars

7 inches of mercury to millibars = 237.04721 millibars

8 inches of mercury to millibars = 270.91109 millibars

9 inches of mercury to millibars = 304.77498 millibars

10 inches of mercury to millibars = 338.63887 millibars

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

inches of mercury to millimeter of water

inches of mercury to inch of water

inches of mercury to hectobar

inches of mercury to foot water

inches of mercury to foot mercury

inches of mercury to micrometer of mercury

inches of mercury to picobar

inches of mercury to zettapascal

inches of mercury to femtobar

inches of mercury to dyne/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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.

A millibar (mb) is 1/1000th of a bar, a unit for measurement of pressure. It is not an SI unit of measure, however it is one of the units used in meteorology when describing atmospheric pressure. The SI unit is the pascal (Pa), with 1 millibar = 100 pascals (a hectopascal)

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