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!

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

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

inch of mercury to ton/square inch

inch of mercury to kilogram-force/square meter

inch of mercury to foot of mercury

inch of mercury to kip/square foot

inch of mercury to millitorr

inch of mercury to pieze

inch of mercury to newton/square meter

inch of mercury to micropascal

inch of mercury to millipascal

inch of mercury to meganewton/square meter

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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