Pascals to atmospheres
Type a value in pascals to see it in atmospheres straight away, or type in the second box to convert back.
Loading the tool…
Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the pascals box.
- Read the result in atmospheres as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
atm = Pa × 0.000009869232667
Multiply the value in pascals by 0.000009869232667 to get atmospheres.
Example
To convert 25 Pa to atmospheres: 25 × 0.000009869232667 = 0.000246731 atm.
Conversion table
| Pascals (Pa) | Atmospheres (atm) |
|---|---|
| 1 | 0.00000986923 |
| 2 | 0.0000197385 |
| 3 | 0.0000296077 |
| 5 | 0.0000493462 |
| 10 | 0.0000986923 |
| 20 | 0.000197385 |
| 25 | 0.000246731 |
| 50 | 0.000493462 |
| 100 | 0.000986923 |
| 250 | 0.00246731 |
| 500 | 0.00493462 |
| 1,000 | 0.00986923 |
About the units
- Pascal
- The SI unit of pressure, equal to a force of one newton acting on one square meter.
- Atmosphere
- The standard atmosphere, defined as exactly 101,325 pascals.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many atmospheres are in one pascal?
1 Pa = 0.00000986923 atm exactly.
How do I convert pascals to atmospheres?
Use atm = Pa × 0.000009869232667. For example, 25 Pa = 0.000246731 atm.
How many pascals are in one atmosphere?
1 atm = 101,325 Pa.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured from the surrounding air pressure, while absolute pressure starts from a perfect vacuum. These converters change the unit only, so a gauge reading stays a gauge reading.
Are torr and mmHg the same?
Almost. One torr is 101325/760 Pa, about 133.322368 Pa, and one conventional mmHg is 133.322387 Pa, a difference of less than one part per million. For everyday use you can treat them as equal.