›› Convert to hectopascal

millimeter mercury

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How many millimeter mercury in 1 hectopascal? The answer is 0.75006157584566.
We assume you are converting between and hectopascal.
You can view more details on each measurement unit:
millimeter mercury or hectopascal
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0075006157584566 millimeter mercury, or 0.01 hectopascal.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimeters mercury and hectopascals.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of millimeter mercury to hectopascal

1 millimeter mercury to hectopascal = 1.33322 hectopascal

5 millimeter mercury to hectopascal = 6.66612 hectopascal

10 millimeter mercury to hectopascal = 13.33224 hectopascal

15 millimeter mercury to hectopascal = 19.99836 hectopascal

20 millimeter mercury to hectopascal = 26.66448 hectopascal

25 millimeter mercury to hectopascal = 33.3306 hectopascal

30 millimeter mercury to hectopascal = 39.99672 hectopascal

40 millimeter mercury to hectopascal = 53.32895 hectopascal

50 millimeter mercury to hectopascal = 66.66119 hectopascal

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

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›› Common pressure conversions

millimeter mercury to kilopond/square meter
millimeter mercury to water column
millimeter mercury to attopascal
millimeter mercury to foot of water
millimeter mercury to ton/square foot
millimeter mercury to torr
millimeter mercury to nanobar
millimeter mercury to ton/square meter
millimeter mercury to inch of water
millimeter mercury to kilopond/square centimeter

›› 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.

›› Definition: Hectopascal

The SI prefix "hecto" represents a factor of 102, or in exponential notation, 1E2.

So 1 hectopascal = 102 pascals.

The definition of a pascal is as follows:

The pascal (symbol Pa) is the SI unit of pressure.It is equivalent to one newton per square metre. The unit is named after Blaise Pascal, the eminent French mathematician, physicist and philosopher.

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