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How many mm H2O in 1 atmosphere?
The answer is 10332.274527999.
We assume you are converting between millimeter water [4 °C] and atmosphere [standard].
You can view more details on each measurement unit:
mm H2O or atmosphere
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.10197162129779 mm H2O, or 9.8692326671601E-6 atmosphere.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimeters water and atmospheres.
Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from atmosphere to mm H2O, or enter any two units below:
mm H2O to yoctopascal
mm H2O to picopascal
mm H2O to foot of water
mm H2O to millibar
mm H2O to centipascal
mm H2O to decipascal
mm H2O to hectopascal
mm H2O to kilopond/square centimeter
mm H2O to ton/square foot
mm H2O to kilogram-force/square millimeter
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference pressure or standard pressure. It is approximately equal to Earth's atmospheric pressure at sea level.
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