›› Convert inch water [4 C] to


inch water
millimeter mercury


›› More information from the unit converter

How many inch water in 1 millimeter mercury? The answer is 0.53524016106163.
We assume you are converting between inch water [4 C] and .
You can view more details on each measurement unit:
inch water or millimeter mercury
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0040146307866177 inch water, or 0.0075006157584566 millimeter mercury.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between inches water and millimeters mercury.
Type in your own numbers in the form to convert the units!


›› Quick conversion chart of inch water to millimeter mercury

1 inch water to millimeter mercury = 1.86832 millimeter mercury

5 inch water to millimeter mercury = 9.3416 millimeter mercury

10 inch water to millimeter mercury = 18.6832 millimeter mercury

15 inch water to millimeter mercury = 28.0248 millimeter mercury

20 inch water to millimeter mercury = 37.3664 millimeter mercury

25 inch water to millimeter mercury = 46.708 millimeter mercury

30 inch water to millimeter mercury = 56.04961 millimeter mercury

40 inch water to millimeter mercury = 74.73281 millimeter mercury

50 inch water to millimeter mercury = 93.41601 millimeter mercury



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›› Common pressure conversions

inch water to millipascal
inch water to poundal/square foot
inch water to inch mercury
inch water to newton/square millimeter
inch water to ton/square meter
inch water to water column
inch water to inch water column
inch water to centihg
inch water to attobar
inch water to pieze


›› Definition: Millimeter mercury

The millimeter of mercury by definition is 133.322387415 Pa (13.5951 g/cm3 9.80665 m/s2 1 mm), which is approximated with known accuracies of density of mercury and standard gravity.

The torr is defined as 1/760 of one standard atmosphere, while the atmosphere is defined as 101325 pascals. Therefore, 1 Torr is equal to
101325/760 Pa. The decimal form of this fraction is approximately 133.322368421.

The relationship between the torr and the millimeter of mercury is:

1 Torr = 0.999999857533699 mmHg
1 mmHg = 1.000000142466321 Torr

The difference between one millimeter of mercury and one torr, as well as between one atmosphere (101.325 kPa) and 760 mmHg (101.3250144354 kPa), is less than one part in seven million (or less than 0.000015%). This small difference is negligible for most applications outside metrology.


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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!