Conversion Formula
$$P_{\text{bar}} = P_{\text{psi}} \times 0.0689476$$
Multiply the pressure in PSI by 0.0689476 to get bar.
psi to bar Conversion Table
| Pound per Square Inch (psi) | Bar (bar) |
|---|---|
| 0.1 | 0.00689476 |
| 0.5 | 0.0344738 |
| 1 | 0.0689476 |
| 2 | 0.137895 |
| 5 | 0.344738 |
| 10 | 0.689476 |
| 25 | 1.72369 |
| 50 | 3.44738 |
| 100 | 6.89476 |
| 250 | 17.2369 |
| 500 | 34.4738 |
| 1,000 | 68.9476 |
psi to bar in Engineering
Pressure conversions are essential across all engineering disciplines — from structural loads (PSI, ksi) to fluid systems (feet of water, mmHg) to atmospheric science (atm, mbar). Accurate pressure conversion is critical for piping design, HVAC, and geotechnical analysis.
Pound per Square Inch: Primary US customary pressure unit. Used extensively in mechanical, civil, and petroleum engineering in the United States.
Bar: Metric pressure unit approximately equal to one atmosphere. Common in European industrial and process engineering.