Convert inch mercury [0 °C] to centimeter water [4 °C]


inch mercury
centimeter water


More information from the unit converter

How many inch mercury in 1 centimeter water? The answer is 0.028959017998228. We assume you are converting between inch mercury [0 °C] and centimeter water [4 °C]. You can view more details on each measurement unit: inch mercury or centimeter water The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529980164712 inch mercury, or 0.010197162129779 centimeter water. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches mercury and centimeters water. Type in your own numbers in the form to convert the units!



Quick conversion chart of inch mercury to centimeter water

1 inch mercury to centimeter water = 34.53156 centimeter water

2 inch mercury to centimeter water = 69.06312 centimeter water

3 inch mercury to centimeter water = 103.59467 centimeter water

4 inch mercury to centimeter water = 138.12623 centimeter water

5 inch mercury to centimeter water = 172.65779 centimeter water

6 inch mercury to centimeter water = 207.18935 centimeter water

7 inch mercury to centimeter water = 241.7209 centimeter water

8 inch mercury to centimeter water = 276.25246 centimeter water

9 inch mercury to centimeter water = 310.78402 centimeter water

10 inch mercury to centimeter water = 345.31558 centimeter water


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Common pressure conversions


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widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.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


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, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!