Psi to Atmospheres
Pounds per square inch is the standard pressure unit for tire inflation and plumbing in the US. One atmosphere is the average air pressure at sea level, used as a reference unit in chemistry and physics. 1 psi equals ≈0.068046 atm, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to pressure, measured here against pressure's base unit (Pa) — every other pressure unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
atm = psi × ≈0.068046
psi = atm × ≈14.6959
Worked example: 5 psi × ≈0.068046 = ≈0.34023 atm.
Conversion table
| PSI (psi) | Atmosphere (atm) |
|---|---|
| 1 psi | ≈0.068046 atm |
| 2 psi | ≈0.136092 atm |
| 3 psi | ≈0.204138 atm |
| 5 psi | ≈0.34023 atm |
| 10 psi | ≈0.68046 atm |
| 20 psi | ≈1.36092 atm |
| 25 psi | ≈1.70115 atm |
| 50 psi | ≈3.4023 atm |
| 100 psi | ≈6.8046 atm |
| 250 psi | ≈17.0115 atm |
| 500 psi | ≈34.023 atm |
| 1,000 psi | ≈68.046 atm |
Frequently asked
- How many Atmospheres in a psi?
- 1 psi equals ≈0.068046 atm.
- How do I convert PSI to Atmospheres?
- Multiply the value in psi by ≈0.068046 to get atm. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — PSI and Atmosphere are both defined by a fixed conversion factor to pressure's base unit (Pa), so the result shown is exact to the precision displayed, not an approximation.