Convert PSI to Atmospheres
One psi equals 0.068046 atmospheres. Type any value to convert psi to atmospheres instantly — with a full reference table below.
Convert PSI to Atmospheres
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How to convert PSI to Atmospheres
To convert psi to atmospheres, multiply by 0.068046. One psi equals 0.068046 atm, and one atmosphere equals 14.69595 psi.
- Take the value in psi — for example 7.5 psi.
- Multiply by 0.068046 (the number of atmospheres in one psi).
- 7.5 × 0.068046 = 0.510345 atm.
Quick mental estimate: Divide the number of psi by 14.7 (accurate to better than 0.05%).
PSI to Atmospheres conversion table
| 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 |
| 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 |
About converting PSI to Atmospheres
PSI (psi) and Atmospheres (atm) are both units of pressure. The exact factor is 1 psi = 0.068046 atm, so multiply by 0.068046 to go from psi to atmospheres (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Atmospheres to PSI converter, or the full unit converter for every unit at once.
Real-world pressure in psi and atmospheres
| Example | PSI | Atmospheres |
|---|---|---|
| A systolic blood pressure of 120 mmHg | 2.320415 psi | 0.157895 atm |
| A pressure cooker's over-pressure (15 psi) | 15 psi | 1.020689 atm |
| The standard atmosphere | 14.69595 psi | 1 atm |
| A typical car tyre (32 psi) | 32 psi | 2.177471 atm |
| An espresso machine (9 bar) | 130.534 psi | 8.882309 atm |
| A road-bike tyre (90 psi) | 90 psi | 6.124137 atm |
| A scuba cylinder (200 bar) | 2,900.755 psi | 197.3847 atm |
“≈” marks typical values; the rest are defined or measured figures.
The units
Pounds-force per square inch, about 6,894.757 Pa.
Used for: US tyre pressure, air compressors and hydraulics.
The standard atmosphere: exactly 101,325 Pa, average sea-level air pressure.
Used for: Chemistry, diving and physics.
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.