›› Convert to hectopascal

inch mercury

›› More information from the unit converter

How many inch mercury in 1 hectopascal? The answer is 0.029529980164712.
We assume you are converting between and hectopascal.
You can view more details on each measurement unit:
inch mercury or hectopascal
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00029529980164712 inch mercury, or 0.01 hectopascal.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches mercury and hectopascals.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of inch mercury to hectopascal

1 inch mercury to hectopascal = 33.86389 hectopascal

2 inch mercury to hectopascal = 67.72778 hectopascal

3 inch mercury to hectopascal = 101.59167 hectopascal

4 inch mercury to hectopascal = 135.45556 hectopascal

5 inch mercury to hectopascal = 169.31945 hectopascal

6 inch mercury to hectopascal = 203.18334 hectopascal

7 inch mercury to hectopascal = 237.04723 hectopascal

8 inch mercury to hectopascal = 270.91112 hectopascal

9 inch mercury to hectopascal = 304.77501 hectopascal

10 inch mercury to hectopascal = 338.6389 hectopascal

›› Want other units?

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

Enter two units to convert


›› Common pressure conversions

inch mercury to kip/square inch
inch mercury to zettapascal
inch mercury to micropascal
inch mercury to yottapascal
inch mercury to nanobar
inch mercury to attopascal
inch mercury to decitorr
inch mercury to megapascal
inch mercury to kilonewton/square meter
inch mercury to centimeter mercury

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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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

The SI prefix "hecto" represents a factor of 102, or in exponential notation, 1E2.

So 1 hectopascal = 102 pascals.

The definition of a pascal is as follows:

The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.

›› Metric conversions and more

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!