›› Convert inch of mercury [0 °C] to technical atmosphere

inch of mercury
technical atmosphere

›› More information from the unit converter

How many inch of mercury in 1 technical atmosphere? The answer is 28.959020848759.
We assume you are converting between inch of mercury [0 °C] and technical atmosphere.
You can view more details on each measurement unit:
inch of mercury or technical atmosphere
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529983071445 inch of mercury, or 1.0197162129779E-5 technical atmosphere.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches of mercury and technical atmospheres.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch of mercury to technical atmosphere

1 inch of mercury to technical atmosphere = 0.03453 technical atmosphere

10 inch of mercury to technical atmosphere = 0.34532 technical atmosphere

20 inch of mercury to technical atmosphere = 0.69063 technical atmosphere

30 inch of mercury to technical atmosphere = 1.03595 technical atmosphere

40 inch of mercury to technical atmosphere = 1.38126 technical atmosphere

50 inch of mercury to technical atmosphere = 1.72658 technical atmosphere

100 inch of mercury to technical atmosphere = 3.45316 technical atmosphere

200 inch of mercury to technical atmosphere = 6.90631 technical atmosphere

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›› Common pressure conversions

inch of mercury to kilopond/square centimeter
inch of mercury to pascal
inch of mercury to millimeter water
inch of mercury to newton/square millimeter
inch of mercury to petapascal
inch of mercury to millimeter of mercury
inch of mercury to inch water column
inch of mercury to yottapascal
inch of mercury to atmosphere
inch of mercury to gigapascal

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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