Pressure (non-SI) Units
Pressure units based on the atmosphere and the mercury barometer that remain in medicine, vacuum work and meteorology. 3 units are listed.
| Unit | Symbol | Quantity | Value in SI |
|---|---|---|---|
| Standard atmosphere | atm | Pressure | 101,325 Pa (exact) |
| Torr | Torr | Pressure | 101,325/760 Pa ≈ 133.322 Pa |
| Millimetre of mercury | mmHg | Pressure | 133.322387415 Pa (conventional) |