Convert Technical Atmospheres to Centimeters of Mercury
Convert Technical Atmospheres (at) to Centimeters of Mercury (cmHg) instantly and accurately.
Conversion Formula
cmHg = at × 73.55591353
About Technical Atmospheres
One technical atmosphere (at) = exactly 1 kgf/cm² = 98,066.5 Pa ≈ 0.968 standard atmospheres. The metric technical pressure unit used in pre-SI European and Japanese engineering for boilers, hydraulic cylinders, and compressed gas systems. A steam boiler at 10 at operates at 0.981 MPa; hydraulic presses are rated at 200-600 at. Still used parenthetically in old German and Japanese machinery manuals and standards (DIN 1301-3 legacy). Converts simply from kgf/cm²: 1 at ≡ 1 kgf/cm². 1 at = 98,066.5 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
| Technical Atmospheres (at) | Centimeters of Mercury (cmHg) |
|---|---|
| 1 at | 73.5559 cmHg |
| 2 at | 147.112 cmHg |
| 5 at | 367.78 cmHg |
| 10 at | 735.559 cmHg |
| 25 at | 1838.9 cmHg |
| 50 at | 3677.8 cmHg |
| 100 at | 7355.59 cmHg |