›› Convert newton/square metre to


newton/square metre
inch mercury


›› More information from the unit converter

How many newton/square metre in 1 inch mercury? The answer is 3386.389.
We assume you are converting between newton/square metre and .
You can view more details on each measurement unit:
newton/square metre or inch mercury
The SI derived unit for pressure is the pascal.
1 pascal is equal to 1 newton/square metre, 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 newtons/square meter and inches mercury.
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›› Common pressure conversions

newton/square metre to inch water column
newton/square metre to foot of head
newton/square metre to micron mercury
newton/square metre to ton/square foot
newton/square metre to millitorr
newton/square metre to inch of mercury
newton/square metre to dekabar
newton/square metre to foot water
newton/square metre to decipascal
newton/square metre to ton/square inch


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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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


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