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millimeter mercury | to |
water column [centimeter] water column [inch] water column [millimeter] |

How many millimeter mercury in 1 water column?
The answer is 0.73555913527668.

We assume you are converting between and **water column [centimeter]**.

You can view more details on each measurement unit:

millimeter mercury or
water column

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.0075006157584566 millimeter mercury, or 0.010197162129779 water column.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between millimeters mercury and water column.

Type in your own numbers in the form to convert the units!

1 millimeter mercury to water column = 1.35951 water column

5 millimeter mercury to water column = 6.79755 water column

10 millimeter mercury to water column = 13.5951 water column

15 millimeter mercury to water column = 20.39265 water column

20 millimeter mercury to water column = 27.1902 water column

25 millimeter mercury to water column = 33.98775 water column

30 millimeter mercury to water column = 40.7853 water column

40 millimeter mercury to water column = 54.3804 water column

50 millimeter mercury to water column = 67.9755 water column

You can do the reverse unit conversion from water column to millimeter mercury, or enter any two units below:

millimeter mercury to terabar

millimeter mercury to centimeter of water

millimeter mercury to centibar

millimeter mercury to kilogram-force/square meter

millimeter mercury to ton/square foot

millimeter mercury to microbar

millimeter mercury to barad

millimeter mercury to hectobar

millimeter mercury to nanobar

millimeter mercury to zeptopascal

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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