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Convert psi to atmospheres
Instant, accurate psi → atm conversion with a live converter, table and formula.
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1 psi = 0.068046 atmospheres
1 atmosphere = 14.6959 psi
psi to atmospheres table
| psi (psi) | atmospheres (atm) |
|---|---|
| 0.5 | 0.034023 |
| 1 | 0.068046 |
| 2 | 0.136092 |
| 5 | 0.34023 |
| 10 | 0.68046 |
| 20 | 1.36092 |
| 50 | 3.4023 |
| 100 | 6.8046 |
| 500 | 34.023 |
| 1000 | 68.046 |
Formula
atmospheres = psi × 0.068046.
Example
10 psi = 0.68046 atmospheres.
What is a psi?
Pounds per square inch (psi) is the imperial pressure unit (tires, etc.).
What is a atmosphere?
One atmosphere (atm) is standard sea-level pressure (101,325 Pa).
Real-world reference points
Sea-level air is ~1 bar (14.7 psi); car tires run ~2.2 bar (32 psi); espresso machines ~9 bar.
| Reference | psi | atmospheres |
|---|---|---|
| Atmosphere (sea level) | 14.7 psi | 1 atm |
| Car tire (32 psi) | 32 psi | 2.18 atm |
| Road-bike tire (80 psi) | 80 psi | 5.44 atm |
| Espresso extraction (9 bar) | 131 psi | 8.88 atm |
Mistakes to avoid with pressure conversions
- Mixing gauge and absolute pressure: tire gauges read pressure ABOVE atmospheric (psig), not absolute (psia).
- Inflating tires to the sidewall maximum instead of the door-jamb recommendation.
- Confusing bar with psi — a 2.2 vs 32 mixup is a dangerous under/over-inflation.
Frequently asked questions
How many atmospheres in a psi?+
1 psi = 0.068046 atmospheres.
How do I convert psi to atmospheres?+
Enter the value in the psi box above and the atmospheres value appears instantly. You can also type in the atmospheres box to convert the other way.
Is this psi to atm converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.