Convert pascal, bar, psi, atmospheres and mmHg.
Units of pressure
The SI unit of pressure is the pascal (Pa), but bar and hectopascal are common in practice: 1 bar = 100,000 Pa = 100 kPa, and weather reports give air pressure in hPa. 1 standard atmosphere (atm) is exactly 101,325 Pa. Tire pressure is often given in psi: 1 bar is about 14.5 psi.
Conversion factors
1 bar = 14.5038 psi
1 psi = 0.0689476 bar
One unit converted to all others: Bar (bar)
| Unit | Value |
|---|
| Pascal (Pa) | 100,000 |
| Kilopascal (kPa) | 100 |
| Bar (bar) | 1 |
| Standard atmosphere (atm) | 0.986923 |
| Pound per square inch (psi) | 14.5038 |
| Millimeter of mercury (mmHg) | 750.064 |
| Megapascal (MPa) | 0.1 |
| Hectopascal (hPa) | 1,000 |
| Inch of mercury (inHg) | 29.53 |
| Kilogram-force per cm² (kgf/cm²) | 1.01972 |
Common values
| Bar (bar) | Pound per square inch (psi) |
|---|
| 1 bar | 14.5038 psi |
| 5 bar | 72.5189 psi |
| 10 bar | 145.038 psi |
| 50 bar | 725.189 psi |
| 100 bar | 1,450.38 psi |
| Pound per square inch (psi) | Bar (bar) |
|---|
| 1 psi | 0.0689476 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 50 psi | 3.44738 bar |
| 100 psi | 6.89476 bar |
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