Convert millimeter water (4°C) to bar
Please provide values below to convert millimeter water (4°C) [mmH2O] to bar [bar], or Convert bar to millimeter water (4°C).
How to Convert Millimeter Water (4°c) to Bar
1 mmH2O = 9.80638e-05 bar
Example: convert 15 mmH2O to bar:
15 mmH2O = 15 × 9.80638e-05 bar = 0.001470957 bar
Millimeter Water (4°c) to Bar Conversion Table
| millimeter water (4°C) | bar |
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Millimeter Water (4°c)
Millimeter water (4°C) is a unit of pressure measuring the height of a water column at 4 degrees Celsius that exerts a specific pressure.
History/Origin
The unit originated from the use of water columns to measure pressure, particularly in hydrology and medical applications, with standardization based on the density of water at 4°C.
Current Use
It is primarily used in medical and scientific contexts to measure low pressures, such as intracranial pressure, respiratory pressures, and in calibration of pressure sensors.
Bar
The bar is a unit of pressure equal to 100,000 pascals, roughly the atmospheric pressure at sea level.
History/Origin
The bar was introduced in 1909 by the British engineering community as a convenient unit for measuring pressure, especially in meteorology and engineering contexts.
Current Use
The bar is widely used in meteorology, engineering, and industrial applications to measure pressure, although the pascal is the SI base unit. It is also common in tire pressure measurements and other pressure-related fields.