PSI to Bar Pressure Converter
Convert pressure values between PSI, bar, atmospheres, kilopascals, millimeters of mercury, and inches of mercury. This tool uses internationally recognized conversion factors anchored to the exact SI definition of the standard atmosphere.
Pressure conversion is essential in engineering, automotive maintenance, HVAC, meteorology, and medical applications. All conversions in this tool are derived from the exact definition: 1 standard atmosphere = 101,325 pascals.
Exact base relationships (from SI definition):
- 1 atm = 101.325 kPa (exact)
- 1 atm = 1.01325 bar (exact)
- 1 atm = 14.695948775 PSI
- 1 atm = 760 mmHg (exact, by definition)
- 1 atm = 29.9213 inHg
Pressure Unit Reference Table:
| PSI | Bar | atm | kPa | mmHg |
|---|---|---|---|---|
| 1 | 0.0689 | 0.0680 | 6.895 | 51.71 |
| 14.696 | 1.0133 | 1.0000 | 101.33 | 760.00 |
| 30 | 2.069 | 2.041 | 206.84 | 1,551.06 |
| 50 | 3.448 | 3.401 | 344.74 | 2,585.10 |
| 100 | 6.895 | 6.803 | 689.48 | 5,170.21 |
Common applications: tire pressure is typically measured in PSI (32-35 PSI for cars), weather barometric pressure uses inHg or hPa (hectopascals = mbar), and blood pressure uses mmHg.