Convert Centimeters of Water to Pascals
Convert Centimeters of Water (cmH₂O) to Pascals (Pa) instantly and accurately.
Conversion Formula
Pa = cmH₂O × 98.0665
About Centimeters of Water
One centimetre of water column (cmH₂O) ≈ 98.07 Pa - the clinical pressure unit for respiratory and intravascular measurements. Mechanical ventilator settings are in cmH₂O: peak inspiratory pressure (PIP) 15-30 cmH₂O; PEEP 5-15 cmH₂O; plateau pressure should stay below 30 cmH₂O to avoid lung injury. Lumbar puncture CSF opening pressure is normally 8-20 cmH₂O. CPAP/BiPAP therapy for sleep apnea: 4-20 cmH₂O. Central venous pressure is also reported in cmH₂O. 1 cmH₂O = 98.0665 Pa.
About Pascals
The pascal (Pa) is the SI unit of pressure - 1 N/m², named after Blaise Pascal (1623-1662). Standard sea-level atmosphere ≈ 101,325 Pa. One pascal is very small: roughly the pressure of a single banknote lying flat. Pascal is simultaneously the SI unit for mechanical stress and elastic modulus: structural steel Young's modulus ~200 GPa; rubber shear modulus ~0.5 MPa. Used universally in fluid mechanics, acoustics, atmospheric science, and materials engineering. 1 Pa = 1 N/m².
Quick Reference Table
| Centimeters of Water (cmH₂O) | Pascals (Pa) |
|---|---|
| 1 cmH₂O | 98.0665 Pa |
| 2 cmH₂O | 196.133 Pa |
| 5 cmH₂O | 490.333 Pa |
| 10 cmH₂O | 980.665 Pa |
| 25 cmH₂O | 2451.66 Pa |
| 50 cmH₂O | 4903.32 Pa |
| 100 cmH₂O | 9806.65 Pa |