How many inch of mercury in 1 gigabar?
The answer is 29529983071.445.

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

You can view more details on each measurement unit:

inch of mercury or
gigabar

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

1 pascal is equal to 0.00029529983071445 inch of mercury, or 1.0E-14 gigabar.

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

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

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

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

inch of mercury to foot mercury

inch of mercury to centimeter water

inch of mercury to centimeter of water

inch of mercury to yoctobar

inch of mercury to exabar

inch of mercury to millipascal

inch of mercury to megabar

inch of mercury to micron mercury

inch of mercury to kilonewton/square meter

inch of mercury to millimeter water

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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 "giga" represents a factor of
10^{9}, or in exponential notation, 1E9.

So 1 gigabar = 10^{9} 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.

**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!