Convert atmospheres to pascals

Explanation

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

In case you are wondering, to convert from atmospheres to pascals you need to multiply by 101325. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 atm=101325 Pa

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

pascalsPa

dimension	pressure
system	International system of units (SI)
symbol	Pa

The pascal (Pa) is the derived SI unit of pressure.

Definition of the pascal

One pascal is the pressure exerted by a force of one newton on a surface of one square meter.

The pascal is homogeneous to kilogram per meter per second squared.

Pa = N m^-2 = kg m⁻¹ s⁻²

The International System of Units 9^th edition p. 137

Equivalences

Here are some equivalences between the pascal and other pressure units:

Some Facts

The pascal is quite a small unit. A common housefly laying flat on your hand would apply a pressure of approximately 8 pascals.

Pressure units

nanopascal	nPa	0.000 000 001
micropascal	µPa	0.000 001
millipascal	mPa	0.001
centipascal	cPa	0.01
decipascal	dPa	0.1
pascal	Pa	1
dekapascal	daPa	10
hectopascal	hPa	100
kilopascal	kPa	1000
megapascal	MPa	1 000 000
gigapascal	GPa	1 000 000 000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.