Atmospheres to psi
Type a value in atmospheres to see it in psi 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 atmospheres box.
- Read the result in psi as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
psi = atm × 14.69594878
Multiply the value in atmospheres by 14.69594878 to get psi.
Example
To convert 25 atm to psi: 25 × 14.69594878 = 367.399 psi.
Conversion table
| Atmospheres (atm) | Psi (psi) |
|---|---|
| 1 | 14.6959 |
| 2 | 29.3919 |
| 3 | 44.0878 |
| 5 | 73.4797 |
| 10 | 146.959 |
| 20 | 293.919 |
| 25 | 367.399 |
| 50 | 734.797 |
| 100 | 1,469.59 |
| 250 | 3,673.99 |
| 500 | 7,347.97 |
| 1,000 | 14,695.9 |
About the units
- Atmosphere
- The standard atmosphere, defined as exactly 101,325 pascals.
- Psi
- One pound-force per square inch, about 6894.757 pascals from the exact definitions of the pound, inch and standard gravity.
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 psi are in one atmosphere?
1 atm = 14.6959 psi exactly.
How do I convert atmospheres to psi?
Use psi = atm × 14.69594878. For example, 25 atm = 367.399 psi.
How many atmospheres are in one psi?
1 psi = 0.068046 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.