Convert Centimeters of Mercury to Petapascals
Convert Centimeters of Mercury (cmHg) to Petapascals (PPa) instantly and accurately.
Conversion Formula
PPa = cmHg × 1.333223874e-12
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 Petapascals
A petapascal (PPa) = 10¹⁵ Pa - pressures found in stellar interiors. The Sun's centre is ~25 PPa, sustained by radiation pressure from nuclear fusion balanced against gravity. White dwarf stars: ~10⁴ PPa (electron degeneracy). Neutron stars: ~10⁹-10¹⁰ PPa, where nuclear structure fails and neutrons drip from nuclei at ~4 × 10⁸ PPa (the neutron drip line). The hadron-quark phase transition in the densest neutron star cores is estimated at 10¹⁰-10¹² PPa. No laboratory experiment can approach petapascal pressures. 1 PPa = 10¹⁵ Pa.
Quick Reference Table
| Centimeters of Mercury (cmHg) | Petapascals (PPa) |
|---|---|
| 1 cmHg | 1.333 × 10-12 PPa |
| 2 cmHg | 2.666 × 10-12 PPa |
| 5 cmHg | 6.666 × 10-12 PPa |
| 10 cmHg | 1.333 × 10-11 PPa |
| 25 cmHg | 3.333 × 10-11 PPa |
| 50 cmHg | 6.666 × 10-11 PPa |
| 100 cmHg | 1.333 × 10-10 PPa |