Atmospheres to Psi
One atmosphere is the average air pressure at sea level, used as a reference unit in chemistry and physics. Pounds per square inch is the standard pressure unit for tire inflation and plumbing in the US. 1 atm equals ≈14.6959 psi, 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
psi = atm × ≈14.6959
atm = psi × ≈0.068046
Worked example: 5 atm × ≈14.6959 = ≈73.4797 psi.
Conversion table
| Atmosphere (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 |
| 20 atm | ≈293.919 psi |
| 25 atm | ≈367.399 psi |
| 50 atm | ≈734.797 psi |
| 100 atm | ≈1,469.59 psi |
| 250 atm | ≈3,673.99 psi |
| 500 atm | ≈7,347.97 psi |
| 1,000 atm | ≈14,695.9 psi |
Frequently asked
- How many PSI in a atmosphere?
- 1 atm equals ≈14.6959 psi.
- How do I convert Atmospheres to PSI?
- Multiply the value in atm by ≈14.6959 to get psi. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Atmosphere and PSI 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.