How many millimeter mercury in 1 inch water column?
The answer is 1.8683201911017.

We assume you are converting between and **inch of water column**.

You can view more details on each measurement unit:

millimeter mercury or
inch water column

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

1 pascal is equal to 0.0075006157584566 millimeter mercury, or 0.0040146307866177 inch 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 inches water column.

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

1 millimeter mercury to inch water column = 0.53524 inch water column

5 millimeter mercury to inch water column = 2.6762 inch water column

10 millimeter mercury to inch water column = 5.3524 inch water column

20 millimeter mercury to inch water column = 10.7048 inch water column

30 millimeter mercury to inch water column = 16.0572 inch water column

40 millimeter mercury to inch water column = 21.40961 inch water column

50 millimeter mercury to inch water column = 26.76201 inch water column

75 millimeter mercury to inch water column = 40.14301 inch water column

100 millimeter mercury to inch water column = 53.52402 inch water column

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

millimeter mercury to ounce/square inch

millimeter mercury to pound/square inch

millimeter mercury to foot of water

millimeter mercury to megabar

millimeter mercury to ton/square foot

millimeter mercury to centimeter mercury

millimeter mercury to newton/square millimeter

millimeter mercury to inch of air

millimeter mercury to technical atmosphere

millimeter mercury to megapascal

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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