›› Convert inch of mercury [0 C] to attobar


inHg
attobar

›› More information from the unit converter

How many inHg in 1 attobar? The answer is 2.9529983071445E-17.
We assume you are converting between inch of mercury [0 C] and attobar.
You can view more details on each measurement unit:
inHg or attobar
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inHg, or 10000000000000 attobar.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches of mercury and attobars.
Type in your own numbers in the form to convert the units!


›› Quick conversion chart of inHg to attobar

1 inHg to attobar = 3.3863886666667E+16 attobar

2 inHg to attobar = 6.7727773333333E+16 attobar

3 inHg to attobar = 1.0159166E+17 attobar

4 inHg to attobar = 1.3545554666667E+17 attobar

5 inHg to attobar = 1.6931943333333E+17 attobar

6 inHg to attobar = 2.0318332E+17 attobar

7 inHg to attobar = 2.3704720666667E+17 attobar

8 inHg to attobar = 2.7091109333333E+17 attobar

9 inHg to attobar = 3.0477498E+17 attobar

10 inHg to attobar = 3.3863886666667E+17 attobar


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›› Common pressure conversions

inHg to gigapascal
inHg to kilobar
inHg to kilogram/square centimeter
inHg to inch water column
inHg to terabar
inHg to dyne/square centimeter
inHg to exapascal
inHg to foot of air
inHg to pound/square foot
inHg to kilogram-force/square meter


›› Definition: Inch of mercury

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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.


›› Definition: Attobar

The SI prefix "atto" represents a factor of 10-18, or in exponential notation, 1E-18.

So 1 attobar = 10-18 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, bros 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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