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Convert atmospheres to psi
Instant, accurate atm → psi conversion with a live converter, table and formula.
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1 atmosphere = 14.6959 psi
1 psi = 0.068046 atmospheres
atmospheres to psi table
| atmospheres (atm) | psi (psi) |
|---|---|
| 0.5 | 7.34797 |
| 1 | 14.6959 |
| 2 | 29.3919 |
| 5 | 73.4797 |
| 10 | 146.959 |
| 20 | 293.919 |
| 50 | 734.797 |
| 100 | 1469.59 |
| 500 | 7347.97 |
| 1000 | 14695.95 |
Formula
psi = atmospheres × 14.6959.
Example
10 atmospheres = 146.959 psi.
What is a atmosphere?
One atmosphere (atm) is standard sea-level pressure (101,325 Pa).
What is a psi?
Pounds per square inch (psi) is the imperial pressure unit (tires, etc.).
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 | atmospheres | psi |
|---|---|---|
| Atmosphere (sea level) | 1 atm | 14.7 psi |
| Car tire (32 psi) | 2.18 atm | 32 psi |
| Road-bike tire (80 psi) | 5.44 atm | 80 psi |
| Espresso extraction (9 bar) | 8.88 atm | 131 psi |
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 psi in a atmospheres?+
1 atmosphere = 14.6959 psi.
How do I convert atmospheres to psi?+
Enter the value in the atmospheres box above and the psi value appears instantly. You can also type in the psi box to convert the other way.
Is this atm to psi converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.