Convert Barye to Centimeters of Water
Convert Barye (Ba) to Centimeters of Water (cmH₂O) instantly and accurately.
Conversion Formula
cmH₂O = Ba × 0.001019716213
About Barye
The barye (Ba) is the CGS unit of pressure - 1 dyne/cm² = exactly 0.1 Pa = 1 µbar. Standard atmosphere = 1,013,250 Ba. It dominated physics and laboratory science from the mid-19th century until SI adoption. Legacy acoustic CGS literature used 1 barye (0.1 Pa) as the underwater reference pressure, creating a 100 dB offset versus the modern 1 µPa reference - a critical correction when comparing historical and modern underwater acoustics databases. Still encountered in classical fluid mechanics derivations and early 20th-century meteorological literature. 1 Ba = 0.1 Pa.
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.
Quick Reference Table
| Barye (Ba) | Centimeters of Water (cmH₂O) |
|---|---|
| 1 Ba | 0.00101972 cmH₂O |
| 2 Ba | 0.00203943 cmH₂O |
| 5 Ba | 0.00509858 cmH₂O |
| 10 Ba | 0.0101972 cmH₂O |
| 25 Ba | 0.0254929 cmH₂O |
| 50 Ba | 0.0509858 cmH₂O |
| 100 Ba | 0.101972 cmH₂O |