Convert millibars to atmospheres

Explanation

From this page you can convert millibars to atmospheres (or mbar to atm) simply, by using the application above.

In case you are wondering, to convert from millibars to atmospheres you need to multiply by 0.0009869. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 mbar≈0.0009869 atm

millibarsmbar

dimension	pressure
symbol	mbar

The millibar (mbar) is a metric unit of pressure not part of the SI.

Definition of the millibar

One millibar is equal to 0.001 bars.

Equivalences

One millibar is equivalent to:

Some Facts

The atmospheric pressure at the surface of Mars varies between 4 and 8.7 millibars depending on the season. So at its maximum, the atmospheric pressure on Mars is less than one hundredth the one on Earth at sea level.

Bar units

millibar	mbar	0.001
centibar	cbar	0.01
decibar	dbar	0.1
bar	bar	1
decabar	dabar	10
hectobar	hbar	100
kilobar	kbar	1000
megabar	Mbar	1 000 000

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.