›› Convert to torr

inch mercury

›› More information from the unit converter

How many inch mercury in 1 torr? The answer is 0.039370068949862.
We assume you are converting between and torr.
You can view more details on each measurement unit:
inch mercury or torr
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529980164712 inch mercury, or 0.0075006168270417 torr.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches mercury and torrs.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch mercury to torr

1 inch mercury to torr = 25.40001 torr

2 inch mercury to torr = 50.80001 torr

3 inch mercury to torr = 76.20002 torr

4 inch mercury to torr = 101.60003 torr

5 inch mercury to torr = 127.00003 torr

6 inch mercury to torr = 152.40004 torr

7 inch mercury to torr = 177.80004 torr

8 inch mercury to torr = 203.20005 torr

9 inch mercury to torr = 228.60006 torr

10 inch mercury to torr = 254.00006 torr

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›› Common pressure conversions

inch mercury to pound/square inch
inch mercury to nanopascal
inch mercury to atmosphere
inch mercury to kilopond/square meter
inch mercury to dekapascal
inch mercury to kilogram/square centimeter
inch mercury to micron of mercury
inch mercury to centihg
inch mercury to barye
inch mercury to centimeter water

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

The torr is a non-SI unit of pressure, named after Evangelista Torricelli. Its symbol is Torr.

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