Convert Millimeters of Mercury to Kilobars
Convert Millimeters of Mercury (mmHg) to Kilobars (kbar) instantly and accurately.
Conversion Formula
kbar = mmHg × 1.333223874e-6
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 Kilobars
A kilobar (kbar) = 1,000 bar = 100 MPa = 10⁸ Pa - standard in high-pressure geophysics and experimental petrology. Earth mantle phase transitions: olivine → wadsleyite at ~130-140 kbar (410 km depth); post-spinel transition at ~230 kbar (660 km). Diamond anvil cells routinely reach 100-400 kbar for materials synthesis and equation-of-state measurement. High-pressure synthesis of cubic boron nitride (~50 kbar) and superhard materials uses large-volume presses. Explosive shock pressures for mining and demolition: 100-1,000 kbar. 1 kbar = 100 MPa.
Quick Reference Table
| Millimeters of Mercury (mmHg) | Kilobars (kbar) |
|---|---|
| 1 mmHg | 1.333 × 10-6 kbar |
| 2 mmHg | 2.666 × 10-6 kbar |
| 5 mmHg | 6.666 × 10-6 kbar |
| 10 mmHg | 1.333 × 10-5 kbar |
| 25 mmHg | 3.333 × 10-5 kbar |
| 50 mmHg | 6.666 × 10-5 kbar |
| 100 mmHg | 0.000133322 kbar |