Convert centimeters of mercury to atmospheres

Explanation

From this page you can convert centimeters of mercury to atmospheres (or cmHg to atm) simply, by using the application above.

In case you are wondering, to convert from centimeters of mercury to atmospheres you need to multiply by 0.01316. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 cmHg≈0.01316 atm

centimeters of mercurycmHg

dimension	pressure
symbol	cmHg

The conventional centimeter of mercury (cmHg) is a unit of pressure.

Definition of the centimeter of mercury

One conventional centimeter of mercury is equal to 10 conventional millimeters of mercury.

Value in terms of the SI

One centimeter of mercury is 1333.224 pascals. This is an approximation.

NIST Guide to the SI, Appendix B.9

Equivalences

One centimeter of mercury is equal to:

Metric mercury units

millimeter of mercury	mmHg	1
centimeter of mercury	cmHg	10
centimeter of mercury at 0 °C	-

Related Conversions

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.