Convert Pascals to Millimeters of Mercury
Convert Pascals (Pa) to Millimeters of Mercury (mmHg) instantly and accurately.
Conversion Formula
mmHg = Pa × 0.007500615758
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.
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.
Quick Reference Table
| Pascals (Pa) | Millimeters of Mercury (mmHg) |
|---|---|
| 1 Pa | 0.00750062 mmHg |
| 2 Pa | 0.0150012 mmHg |
| 5 Pa | 0.0375031 mmHg |
| 10 Pa | 0.0750062 mmHg |
| 25 Pa | 0.187515 mmHg |
| 50 Pa | 0.375031 mmHg |
| 100 Pa | 0.750062 mmHg |