Convert attopascal to centimeter water (4°C)
Please provide values below to convert attopascal [aPa] to centimeter water (4°C) [cmH2O], or Convert centimeter water (4°C) to attopascal.
How to Convert Attopascal to Centimeter Water (4°c)
1 aPa = 1.01974428892211e-20 cmH2O
Example: convert 15 aPa to cmH2O:
15 aPa = 15 × 1.01974428892211e-20 cmH2O = 1.52961643338316e-19 cmH2O
Attopascal to Centimeter Water (4°c) Conversion Table
| attopascal | centimeter water (4°C) |
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Attopascal
The attopascal (aPa) is a unit of pressure equal to 10^-18 pascals, representing an extremely small pressure measurement.
History/Origin
The attopascal was introduced as part of the SI prefixes to denote very small quantities of pressure, but it is rarely used in practical applications due to its minuscule magnitude.
Current Use
The attopascal is primarily used in scientific research and theoretical contexts where extremely small pressure differences are relevant, although it remains largely a conceptual unit.
Centimeter Water (4°c)
Centimeter water (4°C), symbol cmH2O, is a unit of pressure representing the pressure exerted by a one-centimeter column of water at 4 degrees Celsius.
History/Origin
The centimeter water was developed as a practical unit of pressure measurement in medical and engineering contexts, especially for low-pressure measurements such as respiratory and fluid pressure, originating from the use of water columns in manometers.
Current Use
It is primarily used in medical settings to measure intracranial pressure, respiratory pressures, and other low-pressure applications where precise measurement of small pressure differences is required.