›› Convert to gigabar


millimeter mercury
gigabar

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How many millimeter mercury in 1 gigabar? The answer is 750061575845.66.
We assume you are converting between and gigabar.
You can view more details on each measurement unit:
millimeter mercury or gigabar
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0075006157584566 millimeter 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 millimeters mercury and gigabars.
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›› Common pressure conversions

millimeter mercury to centimeter of water
millimeter mercury to decibar
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millimeter mercury to terapascal
millimeter mercury to millimeter of mercury
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millimeter mercury to foot water


›› Definition: Millimeter mercury

The millimeter of mercury by definition is 133.322387415 Pa (13.5951 g/cm3 × 9.80665 m/s2 × 1 mm), which is approximated with known accuracies of density of mercury and standard gravity.

The torr is defined as 1/760 of one standard atmosphere, while the atmosphere is defined as 101325 pascals. Therefore, 1 Torr is equal to
101325/760 Pa. The decimal form of this fraction is approximately 133.322368421.

The relationship between the torr and the millimeter of mercury is:

1 Torr = 0.999999857533699 mmHg
1 mmHg = 1.000000142466321 Torr

The difference between one millimeter of mercury and one torr, as well as between one atmosphere (101.325 kPa) and 760 mmHg (101.3250144354 kPa), is less than one part in seven million (or less than 0.000015%). This small difference is negligible for most applications outside metrology.


›› Definition: Gigabar

The SI prefix "giga" represents a factor of 109, or in exponential notation, 1E9.

So 1 gigabar = 109 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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