How many inch of mercury in 1 torr?
The answer is 0.039370072825186.

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

You can view more details on each measurement unit:

inch of mercury or
torr

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

1 pascal is equal to 0.00029529983071445 inch of 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 of mercury and torrs.

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

1 inch of mercury to torr = 25.4 torr

2 inch of mercury to torr = 50.80001 torr

3 inch of mercury to torr = 76.20001 torr

4 inch of mercury to torr = 101.60002 torr

5 inch of mercury to torr = 127.00002 torr

6 inch of mercury to torr = 152.40002 torr

7 inch of mercury to torr = 177.80003 torr

8 inch of mercury to torr = 203.20003 torr

9 inch of mercury to torr = 228.60003 torr

10 inch of mercury to torr = 254.00004 torr

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

inch of mercury to millibar

inch of mercury to attopascal

inch of mercury to ton/square foot

inch of mercury to gram/square centimeter

inch of mercury to centimeter of mercury

inch of mercury to micron mercury

inch of mercury to ton/square meter

inch of mercury to centimeter mercury

inch of mercury to yoctopascal

inch of mercury to inch water column

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

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

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