›› Convert to foot of head


inch mercury
foot of head

›› More information from the unit converter

How many inch mercury in 1 foot of head? The answer is 0.88244489893914.
We assume you are converting between and foot of head.
You can view more details on each measurement unit:
inch mercury or foot of head
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529980164712 inch mercury, or 0.00033463823293911 foot of head.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches mercury and feet of head.
Type in your own numbers in the form to convert the units!



›› Quick conversion chart of inch mercury to foot of head

1 inch mercury to foot of head = 1.13322 foot of head

5 inch mercury to foot of head = 5.66608 foot of head

10 inch mercury to foot of head = 11.33215 foot of head

15 inch mercury to foot of head = 16.99823 foot of head

20 inch mercury to foot of head = 22.6643 foot of head

25 inch mercury to foot of head = 28.33038 foot of head

30 inch mercury to foot of head = 33.99646 foot of head

40 inch mercury to foot of head = 45.32861 foot of head

50 inch mercury to foot of head = 56.66076 foot of head



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›› Common pressure conversions

inch mercury to dekabar
inch mercury to attopascal
inch mercury to millimeter water
inch mercury to meganewton/square meter
inch mercury to pound/square foot
inch mercury to inch of mercury
inch mercury to exapascal
inch mercury to micrometer of water
inch mercury to dekapascal
inch mercury 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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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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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!