| Did you mean to convert | atmosphere [standard] atmosphere [technical] |
to | inch mercury |
How many atmosphere [standard] in 1 inch mercury? The answer is 0.033421060942512. We assume you are converting between atmosphere [standard] and inch mercury [0 °C]. You can view more details on each measurement unit: atmosphere [standard] or inch mercury The SI derived unit for pressure is the pascal. 1 pascal is equal to 9.8692326671601E-6 atmosphere [standard], or 0.00029529980164712 inch mercury. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between atmospheres and inches mercury. Type in your own numbers in the form to convert the units!
1 atmosphere [standard] to inch mercury = 29.92125 inch mercury
2 atmosphere [standard] to inch mercury = 59.8425 inch mercury
3 atmosphere [standard] to inch mercury = 89.76376 inch mercury
4 atmosphere [standard] to inch mercury = 119.68501 inch mercury
5 atmosphere [standard] to inch mercury = 149.60626 inch mercury
6 atmosphere [standard] to inch mercury = 179.52751 inch mercury
7 atmosphere [standard] to inch mercury = 209.44877 inch mercury
8 atmosphere [standard] to inch mercury = 239.37002 inch mercury
9 atmosphere [standard] to inch mercury = 269.29127 inch mercury
10 atmosphere [standard] to inch mercury = 299.21252 inch mercury
You can do the reverse unit conversion from inch mercury to atmosphere [standard], or enter any two units below:
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference pressure or standard pressure. It is approximately equal to Earth's atmospheric pressure at sea level.
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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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