Convert atmospheres to millimeters of water

Explanation

From this page you can convert atmospheres to millimeters of water (or atm to mmH₂O) simply, by using the application above.

In case you are wondering, to convert from atmospheres to millimeters of water you need to multiply by 10332.2745. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 atm≈10332.2745 mmH₂O

atmospheresatm

dimension	pressure
symbol	atm

The standard atmosphere (atm) is a unit of pressure.

It is approximately equal to the atmospheric pressure on Earth at sea level.

Definition of the atmosphere

One standard atmosphere is equal to 101325 Pa.

10^th CGPM (1954) p. 80

History

The standard atmosphere is used during the 9^th CGPM in the definition of the international temperature scale with the value of 1013250 dynes per square centimetre. That definition is reiterated during the 10^th CGPM with the mention "for all use" and the equivalence of 101325 newtons per square meter is added (and as you all know, 1 pascal is equivalent to 1 newton per square meter).

Equivalences

One standard atmosphere is equivalent to:

Some Facts

For every 10 meters you go down under water, the pressure increases by one atm.
Venus's surface atmospheric pressure is more than 90 atm.
The atmospheric pressure at the top of Mount Everest is approximately 0.33 atm.

Related Conversions

millimeters of watermmH₂O

dimension	pressure
symbol	mmH₂O

The conventional millimeter of water (mmH₂O) is a unit of pressure.

Definition of the millimeter of water

The conventional millimeter of water is defined using a value of 1000 kg/m³ for the density of water and the standard gravity.

Value

One millimeter of water is 9.80665 pascals.

NIST Guide to the SI, Appendix B.9

Equivalences

One millimeter of water is equal to:

Metric water pressure units

millimeter of water	mmH₂O	1
centimeter of water	cmH₂O	10
centimeter of water at 4 °C	-