How many inch mercury in 1 gram-force/square millimetre? The answer is 2.8959017998228. We assume you are converting between inch mercury [0 °C] and gram-force/square millimetre. You can view more details on each measurement unit: inch mercury or gram-force/square millimetre The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch mercury, or 0.00010197162129779 gram-force/square millimetre. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches mercury and grams-force/square millimeter. Type in your own numbers in the form to convert the units!
1 inch mercury to gram-force/square millimetre = 0.34532 gram-force/square millimetre
5 inch mercury to gram-force/square millimetre = 1.72658 gram-force/square millimetre
10 inch mercury to gram-force/square millimetre = 3.45316 gram-force/square millimetre
20 inch mercury to gram-force/square millimetre = 6.90631 gram-force/square millimetre
30 inch mercury to gram-force/square millimetre = 10.35947 gram-force/square millimetre
40 inch mercury to gram-force/square millimetre = 13.81262 gram-force/square millimetre
50 inch mercury to gram-force/square millimetre = 17.26578 gram-force/square millimetre
75 inch mercury to gram-force/square millimetre = 25.89867 gram-force/square millimetre
100 inch mercury to gram-force/square millimetre = 34.53156 gram-force/square millimetre
You can do the reverse unit conversion from gram-force/square millimetre to inch mercury, or enter any two units below:
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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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