How many inch of mercury in 1 zettabar?
The answer is 2.9529983071445E+22.

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

You can view more details on each measurement unit:

inch of mercury or
zettabar

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

1 pascal is equal to 0.00029529983071445 inch of mercury, or 1.0E-26 zettabar.

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

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

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

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

inch of mercury to atmosphere

inch of mercury to zeptopascal

inch of mercury to centimeter mercury

inch of mercury to micropascal

inch of mercury to poundal/square foot

inch of mercury to torr

inch of mercury to exabar

inch of mercury to nanopascal

inch of mercury to foot of mercury

inch of mercury to millipascal

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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 "zetta" represents a factor of
10^{21}, or in exponential notation, 1E21.

So 1 zettabar = 10^{21} 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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