Convert Centimeters of Mercury to Millimeters of Mercury
Convert Centimeters of Mercury (cmHg) to Millimeters of Mercury (mmHg) instantly and accurately.
Conversion Formula
mmHg = cmHg × 10
About Centimeters of Mercury
One centimetre of mercury (cmHg) = 10 mmHg ≈ 1,333.22 Pa. Historical medical and physiological literature used cmHg for intracardiac and intravascular pressures before mmHg became universal. Left ventricular systolic pressure ~12 cmHg; pulmonary artery systolic 2-3 cmHg. Some older European cardiological textbooks and pre-1970s surgical literature report pressures in cmHg. Central venous pressure, cerebral perfusion pressure, and intra-abdominal pressure are occasionally cited in cmHg in legacy datasets. 1 cmHg = 1,333.22 Pa.
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
| Centimeters of Mercury (cmHg) | Millimeters of Mercury (mmHg) |
|---|---|
| 1 cmHg | 10 mmHg |
| 2 cmHg | 20 mmHg |
| 5 cmHg | 50 mmHg |
| 10 cmHg | 100 mmHg |
| 25 cmHg | 250 mmHg |
| 50 cmHg | 500 mmHg |
| 100 cmHg | 1000 mmHg |