How many millimeter water in 1 mm mercury? The answer is 13.5951. We assume you are converting between millimeter water [4 °C] and millimeter mercury [0 °C]. You can view more details on each measurement unit: millimeter water or mm mercury The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.10197162129779 millimeter water, or 0.0075006157584566 mm mercury. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimeters water and millimeters mercury. Type in your own numbers in the form to convert the units!
1 millimeter water to mm mercury = 0.07356 mm mercury
10 millimeter water to mm mercury = 0.73556 mm mercury
20 millimeter water to mm mercury = 1.47112 mm mercury
30 millimeter water to mm mercury = 2.20668 mm mercury
40 millimeter water to mm mercury = 2.94224 mm mercury
50 millimeter water to mm mercury = 3.6778 mm mercury
100 millimeter water to mm mercury = 7.35559 mm mercury
200 millimeter water to mm mercury = 14.71118 mm mercury
You can do the reverse unit conversion from mm mercury to millimeter water, or enter any two units below:
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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