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Pressure
Atmospheres to Pascals
Convert atmospheres (atm) to pascals (Pa). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 atm = 101325 Pa
Atmospheres to Pascals Conversion Table
Common values, ready to copy:
| atmospheres | pascals |
|---|---|
| 1 atm | 101325 Pa |
| 2 atm | 202650 Pa |
| 5 atm | 506625 Pa |
| 10 atm | 1.0133e+6 Pa |
| 25 atm | 2.5331e+6 Pa |
| 50 atm | 5.0663e+6 Pa |
| 100 atm | 1.0133e+7 Pa |
| 1,000 atm | 1.0133e+8 Pa |
Formula
pascals = atmospheres × 101325
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 Atmospheres and Pascals
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.
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.
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 pascals = atmospheres × 101325, 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 atmospheres and pascals 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.