Pascals to Atmospheres
Type a value in either box to convert between pascals and atmospheres. The factor is 9.86923e-06.
| Pascals | Atmospheres |
|---|---|
| 1 Pa | 9.86923e-06 atm |
| 2 Pa | 1.97385e-05 atm |
| 3 Pa | 2.96077e-05 atm |
| 5 Pa | 4.93462e-05 atm |
| 10 Pa | 9.86923e-05 atm |
| 25 Pa | 0.000247 atm |
| 50 Pa | 0.000493 atm |
| 100 Pa | 0.000987 atm |
How to use
- Enter a value in the Pascals field.
- The Atmospheres figure appears immediately — no button to press.
- Typing in the Atmospheres field converts back to Pascals the same way.
- Use the reference table for the values that come up most often.
Pascals to Atmospheres formula
To convert pascals to atmospheres, multiply by 9.86923267e-06.
atm = Pa × 9.86923267e-06
Why this factor: the pascal and the atmosphere are both defined against the pascal, so dividing one definition by the other gives 9.86923267e-06 directly. Both definitions are set out in full below.
To go the other way, divide by 9.86923267e-06 — or use the Atmospheres to Pascals converter, which is the same calculation reversed.
Worked example
Given 760 Pa, multiplying by 9.86923267e-06 yields 0.007501 atm.
760 Pa × 9.86923267e-06 = 0.007501 atm
The converter above does this for any value you type, in either direction.
What is a pascal?
The pascal is the SI unit of pressure — one newton of force spread over one square meter.
Definition: Defined as 1 N/m². Named after Blaise Pascal.
Where it is used: Scientific and engineering pressure calculations, and weather pressure in hectopascals.
Worth knowing: A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
What is an atmosphere?
A standard atmosphere is a fixed reference pressure, originally average sea-level air pressure.
Definition: Defined as exactly 101,325 pascals — an exact convention, not a measurement.
Where it is used: Chemistry reference conditions, diving pressure, and high-pressure physics.
Pascals vs Atmospheres
The pascal is an SI unit while the atmosphere is a specialized unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many atmospheres are in a pascal?
One pascal equals 9.86923267e-06 atmospheres.
What is the formula to convert pascals to atmospheres?
Multiply the number of pascals by 9.86923267e-06. To reverse it, divide by 9.86923267e-06 instead.
How do I convert atmospheres back to pascals?
Divide by 9.86923267e-06, which is the same as multiplying by 101325.
How many atmospheres are in 10 pascals?
10 Pa works out to 9.86923e-05 atm.
Is there anything to watch out for with pascals?
A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
How is the pascal defined?
Defined as 1 N/m². Named after Blaise Pascal.