PSI to atmospheres – convert psi to atm
Convert PSI to atmospheres (pounds per square inch to atm) to express tyre, scuba or system pressures relative to standard atmospheric pressure.
Open the interactive psi → atm converter:
Use main converter (psi → atm) or switch to atm → psiThe pressure converter also links PSI, bar, kilopascals, pascals and millibars with the same interface.
Quick reference: psi to atm
One psi is about 0.068046 atm. So: atm = psi ÷ 14.6959. Common examples:
| PSI | Atmospheres (approx.) |
|---|---|
| 5 psi | 0.34 atm |
| 10 psi | 0.68 atm |
| 15 psi | 1.02 atm |
| 20 psi | 1.36 atm |
| 30 psi | 2.04 atm |
| 40 psi | 2.72 atm |
Why convert PSI to atmospheres?
psi to atm helps when you:
- Compare tyre pressures with atmospheric pressure for safety checks.
- Relate scuba cylinder or regulator pressures to depth and environment.
- Move between imperial pressure specs and SI-based engineering data.
- Teach how absolute, gauge and differential pressure measurements relate.
Other pressure converters on this site
For most everyday uses, rounding to 2 decimal places is fine, but the main converter keeps the full precision for more technical work.
Page last updated: 4 December 2025.