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Pressure
Pascals to Atmospheres
Convert pascals (Pa) to atmospheres (atm). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 Pa = 9.8692e-6 atm
Pascals to Atmospheres Conversion Table
Common values, ready to copy:
| pascals | atmospheres |
|---|---|
| 1 Pa | 9.8692e-6 atm |
| 2 Pa | 1.9738e-5 atm |
| 5 Pa | 4.9346e-5 atm |
| 10 Pa | 9.8692e-5 atm |
| 25 Pa | 0.000247 atm |
| 50 Pa | 0.000493 atm |
| 100 Pa | 0.000987 atm |
| 1,000 Pa | 0.009869 atm |
Formula
atmospheres = pascals × 9.86923267e-6
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About Pascals and Atmospheres
Pascals (Pa): The SI unit of pressure, defined as one newton per square meter; named for Blaise Pascal, who established fundamental principles of fluid pressure in the 17th century. Common uses: Scientific work, weather (atmospheric pressure in hectopascals or kilopascals), and engineering specifications.
Atmospheres (atm): Originally the average atmospheric pressure at sea level (101,325 Pa exactly); replaced in scientific work by the kilopascal but still used in chemistry and physiology. Common uses: Chemistry (gas-phase reactions, vapor pressure references), diving (depth pressure in atmospheres of seawater), and some compressed-gas contexts.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is atmospheres = pascals × 9.86923267e-6, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between pascals and atmospheres comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.