Convert Millimeters of Mercury to Pascals
Convert Millimeters of Mercury (mmHg) to Pascals (Pa) instantly and accurately.
Conversion Formula
Pa = mmHg × 133.3223874
About Millimeters of Mercury
One millimetre of mercury (mmHg) = pressure from 1 mm of mercury at 0°C and standard gravity = 133.322 Pa. Clinical medicine worldwide uses mmHg for blood pressure (normal ~120/80 mmHg) and for gas partial pressures in physiology: arterial O₂ ~95-100 mmHg; CO₂ ~40 mmHg; alveolar O₂ ~104 mmHg. Ophthalmologists measure intraocular pressure in mmHg (normal 10-21; glaucoma risk above 21). Vacuum equipment ratings are also given in mmHg. 760 mmHg = 1 atm. 1 mmHg = 133.322 Pa.
About Pascals
The pascal (Pa) is the SI unit of pressure - 1 N/m², named after Blaise Pascal (1623-1662). Standard sea-level atmosphere ≈ 101,325 Pa. One pascal is very small: roughly the pressure of a single banknote lying flat. Pascal is simultaneously the SI unit for mechanical stress and elastic modulus: structural steel Young's modulus ~200 GPa; rubber shear modulus ~0.5 MPa. Used universally in fluid mechanics, acoustics, atmospheric science, and materials engineering. 1 Pa = 1 N/m².
Quick Reference Table
| Millimeters of Mercury (mmHg) | Pascals (Pa) |
|---|---|
| 1 mmHg | 133.322 Pa |
| 2 mmHg | 266.645 Pa |
| 5 mmHg | 666.612 Pa |
| 10 mmHg | 1333.22 Pa |
| 25 mmHg | 3333.06 Pa |
| 50 mmHg | 6666.12 Pa |
| 100 mmHg | 13332.2 Pa |