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Conversion formulas
psi = bar × 14.5038
bar = psi ÷ 14.5038
1 bar is defined as exactly 100,000 pascals — slightly less than one atmosphere (1 atm = 101,325 Pa). Most everyday pressures (tires, hoses, gauges) fall in the 1–10 bar / 15–150 psi range.
Reference pressures
| Context | Bar | PSI |
|---|---|---|
| Standard atmosphere | 1.013 | 14.7 |
| Car tire (typical) | 2.2 | 32 |
| Road bike tire | 6.9 | 100 |
| Espresso machine | 9 | 130 |
| SCUBA tank (full) | 200 | 2,900 |
Convert pressure
Bar ↔ PSI
Bar (bar)
PSI (psi)
Press / to focus
| Unit | 1 bar equals |
|---|---|
| Pascal (Pa) | 100,000 |
| Kilopascal (kPa) | 100 |
| Megapascal (MPa) | 0.1 |
| Bar (bar) | 1 |
| PSI (psi) | 14.5038 |
| Atmosphere (atm) | 0.986923 |
| Torr (Torr) | 750.064 |
| mmHg (mmHg) | 750.064 |
Gauge vs absolute pressure
Tire pressure is gauge pressure — measured relative to atmosphere. Absolute pressure adds ~1 atm (14.7 psi) on top. Most consumer gauges read in gauge pressure unless labeled 'abs'.
Related converters
The tools mentioned in this guide — one tap away.
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