Convert Centimeters of Mercury to Pounds per Square Foot
Convert Centimeters of Mercury (cmHg) to Pounds per Square Foot (lbf/ft²) instantly and accurately.
Conversion Formula
lbf/ft² = cmHg × 27.84495954
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 Pounds per Square Foot
One pound per square foot (psf) ≈ 47.88 Pa - the standard structural engineering load unit in US practice. Building codes specify design loads in psf: residential floors 40 psf; office buildings 50-80 psf; assembly areas 100+ psf; snow loads can exceed 100 psf. Wind pressure on building facades, soil bearing capacity for shallow foundations, and lateral earth pressure in retaining walls are all in psf. The related unit ksf (1,000 psf = 47.88 kPa) covers higher-capacity soils and deep foundations. 1 psf = 47.88 Pa.
Quick Reference Table
| Centimeters of Mercury (cmHg) | Pounds per Square Foot (lbf/ft²) |
|---|---|
| 1 cmHg | 27.845 lbf/ft² |
| 2 cmHg | 55.6899 lbf/ft² |
| 5 cmHg | 139.225 lbf/ft² |
| 10 cmHg | 278.45 lbf/ft² |
| 25 cmHg | 696.124 lbf/ft² |
| 50 cmHg | 1392.25 lbf/ft² |
| 100 cmHg | 2784.5 lbf/ft² |