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!

››Want other units?

You can do the reverse unit conversion from
atmosphere to mm H2O, or enter any two units below:

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.

››Metric conversions and more

ConvertUnits.com provides an online
conversion calculator for all types of measurement units.
You can find metric conversion tables for SI units, as well
as English units, currency, and other data. Type in unit
symbols, abbreviations, or full names for units of length,
area, mass, pressure, and other types. Examples include mm,
inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm,
metres squared, grams, moles, feet per second, and many more!