Convert Atmospheres to PSI
One atmosphere equals 14.69595 psi. Type any value to convert atmospheres to psi instantly — with a full reference table below.
Convert Atmospheres to PSI
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How to convert Atmospheres to PSI
To convert atmospheres to psi, multiply by 14.69595. One atmosphere equals 14.69595 psi, and one psi equals 0.068046 atm.
- Take the value in atmospheres — for example 7.5 atm.
- Multiply by 14.69595 (the number of psi in one atmosphere).
- 7.5 × 14.69595 = 110.2196 psi.
Quick mental estimate: Multiply the number of atmospheres by 14.7 (accurate to better than 0.05%).
Atmospheres to PSI conversion table
| Atmospheres | PSI |
|---|---|
| 1 atm | 14.69595 psi |
| 2 atm | 29.3919 psi |
| 5 atm | 73.47974 psi |
| 10 atm | 146.9595 psi |
| 15 atm | 220.4392 psi |
| 20 atm | 293.919 psi |
| 30 atm | 440.8785 psi |
| 32 atm | 470.2704 psi |
| 40 atm | 587.838 psi |
| 50 atm | 734.7974 psi |
| 100 atm | 1,469.595 psi |
| PSI | Atmospheres |
|---|---|
| 1 psi | 0.068046 atm |
| 2 psi | 0.136092 atm |
| 5 psi | 0.34023 atm |
| 10 psi | 0.68046 atm |
| 15 psi | 1.020689 atm |
| 20 psi | 1.360919 atm |
| 30 psi | 2.041379 atm |
| 32 psi | 2.177471 atm |
| 40 psi | 2.721839 atm |
| 50 psi | 3.402298 atm |
| 100 psi | 6.804596 atm |
About converting Atmospheres to PSI
Atmospheres (atm) and PSI (psi) are both units of pressure. The exact factor is 1 atm = 14.69595 psi, so multiply by 14.69595 to go from atmospheres to psi (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the PSI to Atmospheres converter, or the full unit converter for every unit at once.
Real-world pressure in atmospheres and psi
| Example | Atmospheres | PSI |
|---|---|---|
| A systolic blood pressure of 120 mmHg | 0.157895 atm | 2.320415 psi |
| A pressure cooker's over-pressure (15 psi) | 1.020689 atm | 15 psi |
| The standard atmosphere | 1 atm | 14.69595 psi |
| A typical car tyre (32 psi) | 2.177471 atm | 32 psi |
| An espresso machine (9 bar) | 8.882309 atm | 130.534 psi |
| A road-bike tyre (90 psi) | 6.124137 atm | 90 psi |
| A scuba cylinder (200 bar) | 197.3847 atm | 2,900.755 psi |
“≈” marks typical values; the rest are defined or measured figures.
The units
The standard atmosphere: exactly 101,325 Pa, average sea-level air pressure.
Used for: Chemistry, diving and physics.
Pounds-force per square inch, about 6,894.757 Pa.
Used for: US tyre pressure, air compressors and hydraulics.
The bar (100,000 Pa) and the standard atmosphere (101,325 Pa) are exact; psi is derived from the pound-force and the inch, so its factor is a rounded value of an exact fraction.