Handy Units
Atmospheres to PSIatm → psi
1 atm = 14.6959 psi · 1 psi = 0.068046 atm
Formula
psi ≈ atm × 14.6959
Example: 3 atm = 3 × 14.6959 = 44.0878 psi
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
Atmospheres and PSI chart
| Atmospheres (atm) | PSI (psi) |
|---|---|
| 1 atm | 14.6959 psi |
| 2 atm | 29.3919 psi |
| 3 atm | 44.0878 psi |
| 5 atm | 73.4797 psi |
| 10 atm | 146.959 psi |
| PSI (psi) | Atmospheres (atm) |
|---|---|
| 1 psi | 0.068046 atm |
| 10 psi | 0.68046 atm |
| 20 psi | 1.36092 atm |
| 28 psi | 1.90529 atm |
| 30 psi | 2.04138 atm |
| 32 psi | 2.17747 atm |
| 33 psi | 2.24552 atm |
| 35 psi | 2.38161 atm |
| 36 psi | 2.44965 atm |
| 40 psi | 2.72184 atm |
| 50 psi | 3.4023 atm |
| 100 psi | 6.8046 atm |
About these units
Atmosphere (atm)1 standard atmosphere = 101.325 kPa, about the average air pressure at sea level.
Pound per square inch (psi)Pounds per square inch, the US unit for tire pressure: 1 psi ≈ 6.895 kPa.
Questions
How many PSI are in 1 Atmospheres?
1 atm = 14.6959 psi.
How many Atmospheres are in 1 PSI?
1 psi = 0.068046 atm.