Convert Centimeters of Water to Micropascals
Convert Centimeters of Water (cmH₂O) to Micropascals (µPa) instantly and accurately.
Conversion Formula
µPa = cmH₂O × 98066500
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 Micropascals
A micropascal (µPa) is 10⁻⁶ Pa - the standard reference unit for sound pressure levels in acoustics. The threshold of human hearing in air is 20 µPa, which defines 0 dB SPL; underwater acoustics uses 1 µPa as its reference (0 dB re 1 µPa). Blue whale calls reach ~189 dB re 1 µPa at source. Industrial noise regulations, architectural acoustics, and loudspeaker sensitivity specifications all trace back to µPa reference levels. Solar wind pressure near Earth averages ~1-6 nPa, rising to hundreds of µPa during major solar storms. 1 µPa = 10⁻⁶ Pa.
Quick Reference Table
| Centimeters of Water (cmH₂O) | Micropascals (µPa) |
|---|---|
| 1 cmH₂O | 98066500 µPa |
| 2 cmH₂O | 196133000 µPa |
| 5 cmH₂O | 490333000 µPa |
| 10 cmH₂O | 980665000 µPa |
| 25 cmH₂O | 2.452 × 109 µPa |
| 50 cmH₂O | 4.903 × 109 µPa |
| 100 cmH₂O | 9.807 × 109 µPa |