Convert Millimeters of Mercury to Barye
Convert Millimeters of Mercury (mmHg) to Barye (Ba) instantly and accurately.
Conversion Formula
Ba = mmHg × 1333.223874
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 Barye
The barye (Ba) is the CGS unit of pressure - 1 dyne/cm² = exactly 0.1 Pa = 1 µbar. Standard atmosphere = 1,013,250 Ba. It dominated physics and laboratory science from the mid-19th century until SI adoption. Legacy acoustic CGS literature used 1 barye (0.1 Pa) as the underwater reference pressure, creating a 100 dB offset versus the modern 1 µPa reference - a critical correction when comparing historical and modern underwater acoustics databases. Still encountered in classical fluid mechanics derivations and early 20th-century meteorological literature. 1 Ba = 0.1 Pa.
Quick Reference Table
| Millimeters of Mercury (mmHg) | Barye (Ba) |
|---|---|
| 1 mmHg | 1333.22 Ba |
| 2 mmHg | 2666.45 Ba |
| 5 mmHg | 6666.12 Ba |
| 10 mmHg | 13332.2 Ba |
| 25 mmHg | 33330.6 Ba |
| 50 mmHg | 66661.2 Ba |
| 100 mmHg | 133322 Ba |