Convert Hectopascals to Centimeters of Mercury
Convert Hectopascals (hPa) to Centimeters of Mercury (cmHg) instantly and accurately.
Conversion Formula
cmHg = hPa × 0.07500615758
About Hectopascals
A hectopascal (hPa) = 100 Pa = 1 mbar - the WMO-official SI-compatible meteorological pressure unit since 1986, replacing millibar with no numerical change. All modern surface observations (METAR, SYNOP), digital barometers, aviation weather, and weather apps report in hPa. QNH altimeter settings outside North America are in hPa. ICAO standard sea-level pressure is 1013.25 hPa. Continental high-pressure record exceeds 1084 hPa; Typhoon Tip (1979) holds the low record at ~870 hPa. 1 hPa = 100 Pa.
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.
Quick Reference Table
| Hectopascals (hPa) | Centimeters of Mercury (cmHg) |
|---|---|
| 1 hPa | 0.0750062 cmHg |
| 2 hPa | 0.150012 cmHg |
| 5 hPa | 0.375031 cmHg |
| 10 hPa | 0.750062 cmHg |
| 25 hPa | 1.87515 cmHg |
| 50 hPa | 3.75031 cmHg |
| 100 hPa | 7.50062 cmHg |