Did you mean to convert |
atmosphere [standard] atmosphere [technical] |
to |
inch of mercury |

How many atmosphere in 1 inch of mercury?
The answer is 0.033421054354366.

We assume you are converting between **atmosphere [standard]** and **inch of mercury [0 °C]**.

You can view more details on each measurement unit:

atmosphere or
inch of mercury

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 9.8692316931427E-6 atmosphere, or 0.00029529983071445 inch of mercury.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between atmospheres and inches of mercury.

Type in your own numbers in the form to convert the units!

1 atmosphere to inch of mercury = 29.92126 inch of mercury

2 atmosphere to inch of mercury = 59.84252 inch of mercury

3 atmosphere to inch of mercury = 89.76377 inch of mercury

4 atmosphere to inch of mercury = 119.68503 inch of mercury

5 atmosphere to inch of mercury = 149.60629 inch of mercury

6 atmosphere to inch of mercury = 179.52755 inch of mercury

7 atmosphere to inch of mercury = 209.44881 inch of mercury

8 atmosphere to inch of mercury = 239.37007 inch of mercury

9 atmosphere to inch of mercury = 269.29132 inch of mercury

10 atmosphere to inch of mercury = 299.21258 inch of mercury

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

atmosphere to kilogram/square centimeter

atmosphere to meganewton/square meter

atmosphere to pascal

atmosphere to barye

atmosphere to yottabar

atmosphere to foot mercury

atmosphere to kip/square inch

atmosphere to nanobar

atmosphere to centibar

atmosphere to gigapascal

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

**ConvertUnits.com** provides an online
conversion calculator for all types of measurement units.
You can find metric conversion tables for SI units, as well
as English units, currency, and other data. Type in unit
symbols, abbreviations, or full names for units of length,
area, mass, pressure, and other types. Examples include mm,
inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm,
metres squared, grams, moles, feet per second, and many more!