Instant PSI to bar conversion calculator for boost, tire, and hydraulic pressure. Enter a value and get accurate results on any device.
PSI to BAR Conversion Tool
Accurate pressure readings are critical for turbo boost tuning, tire inflation, and hydraulic system safety. This calculator converts pounds per square inch (PSI) to bar—and back—using the precise constant 1 bar = 14.5038 psi. Just enter a value in either field; the other updates automatically with three-decimal accuracy.
Understanding PSI and Bar
PSI is common in the United States and motorsport boost gauges, while bar dominates European specs and many OEM service manuals. Converting correctly prevents under- or over-inflation and ensures that boost targets match ECU tables.
PSI to BAR Formula
PSI to BAR Formula
The pressure conversion formula is straightforward: bar = PSI ÷ 14.5038
Popular examples:
- 15 PSI in bar = 1.03
- 25 PSI in bar = 1.72
- 30 PSI in bar = 2.07
PSI to BAR Conversion Table
| PSI | Bar |
|---|---|
| 10 | 0.69 |
| 15 | 1.03 |
| 20 | 1.38 |
| 25 | 1.72 |
| 30 | 2.07 |
| 35 | 2.41 |
| 40 | 2.76 |
| 45 | 3.10 |
| 50 | 3.45 |
| 55 | 3.79 |
| 60 | 4.14 |
| 65 | 4.48 |
| 70 | 4.83 |
| 75 | 5.17 |
| 80 | 5.52 |
| 85 | 5.86 |
| 90 | 6.21 |
| 95 | 6.55 |
| 100 | 6.89 |
Why precise conversions matter
• Turbocharged engines rely on exact manifold pressure to avoid knock and over-boost cut.
• Tire life and grip depend on correct cold PSI or bar settings.
• Hydraulic clutch and brake systems list maximum operating pressures in bar—exceeding them risks seal failure.
Tips for reliable readings
Use a quality digital gauge, measure tires when cold, and log boost in both PSI and bar when sharing data with international tuners.
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