Atmospheres to pascals
Type a value in atmospheres to see it in pascals straight away, or type in the second box to convert back.
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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 atmospheres box.
- Read the result in pascals as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
Pa = atm × 101,325
Multiply the value in atmospheres by 101,325 to get pascals.
Example
To convert 25 atm to pascals: 25 × 101,325 = 2,533,130 Pa.
Conversion table
| Atmospheres (atm) | Pascals (Pa) |
|---|---|
| 1 | 101,325 |
| 2 | 202,650 |
| 3 | 303,975 |
| 5 | 506,625 |
| 10 | 1,013,250 |
| 20 | 2,026,500 |
| 25 | 2,533,130 |
| 50 | 5,066,250 |
| 100 | 10,132,500 |
| 250 | 25,331,300 |
| 500 | 50,662,500 |
| 1,000 | 101,325,000 |
About the units
- Atmosphere
- The standard atmosphere, defined as exactly 101,325 pascals.
- Pascal
- The SI unit of pressure, equal to a force of one newton acting on one square meter.
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 pascals are in one atmosphere?
1 atm = 101,325 Pa exactly.
How do I convert atmospheres to pascals?
Use Pa = atm × 101,325. For example, 25 atm = 2,533,130 Pa.
How many atmospheres are in one pascal?
1 Pa = 0.00000986923 atm.
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.