Atm to PSI Converter
Convert atmospheres (atm) to PSI and PSI to atm instantly.
Common Pressure Reference Table
| Atmospheres (atm) | PSI | Description |
|---|---|---|
| 1 | 14.6959 | Standard sea-level atmospheric pressure |
| 2 | 29.3918 | Twice atmospheric pressure |
| 2.0414 | 30 | Typical car tyre pressure |
| 3 | 44.0877 | Three atmospheres |
| 6.8046 | 100 | High-pressure cleaning range |
| 10 | 146.959 | Ten atmospheres |
Atmosphere and PSI Conversion Formulas
Converting between atmospheres and PSI relies on a single fixed conversion factor. One standard atmosphere equals exactly 14.6959 pounds per square inch, so each conversion is a simple multiplication or division.
Atmospheres to PSI
psi = atm × 14.6959
Example: 2 atm × 14.6959 = 29.3918 psi
PSI to Atmospheres
atm = psi ÷ 14.6959
Example: 30 psi ÷ 14.6959 = 2.04139 atm
Key Reference Pressures
- Standard atmosphere: 1 atm = 14.6959 psi. The average atmospheric pressure at sea level.
- Car tyre pressure: roughly 30 psi ≈ 2.04 atm. A common recommended pressure for passenger vehicles.
- Two atmospheres: 2 atm = 29.3918 psi. The pressure at about 10 metres of water depth.
- Ten atmospheres: 10 atm = 146.959 psi. A useful round benchmark for high-pressure systems.