The SI unit is the pascal (Pa), with 1 millibar = 100 pascals (a hectopascal)Ĭonversion calculator for all types of measurement units. It is not an SI unit of measure, however it is one of the units used in meteorology when describing atmospheric pressure.
This small difference is negligible for most applications outside metrology.Ī millibar (mb) is 1/1000th of a bar, a unit for measurement of pressure. 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%). The relationship between the torr and the millimeter of mercury is:
The decimal form of this fraction is approximately 133.322368421. Therefore, 1 Torr is equal toġ01325/760 Pa. The torr is defined as 1/760 of one standard atmosphere, while the atmosphere is defined as 101325 pascals. 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. Mb to mm Hg, or enter any two units below: Enter two units to convert From: You can do the reverse unit conversion from
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