How many inch mercury in 1 gigapascal?
The answer is 295299.80164712.

We assume you are converting between and **gigapascal**.

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inch mercury or
gigapascal

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

1 pascal is equal to 0.00029529980164712 inch mercury, or 1.0E-9 gigapascal.

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

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

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

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

inch mercury to femtobar

inch mercury to pound/square inch

inch mercury to foot of head

inch mercury to foot of mercury

inch mercury to millimeter water

inch mercury to sthene/square meter

inch mercury to attobar

inch mercury to terapascal

inch mercury to pieze

inch mercury to centipascal

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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 gigapascal = 10^{9} pascals.

The definition of a pascal is as follows:

The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.

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