Convert Centimeters of Water to Kilopounds per Square Inch
Convert Centimeters of Water (cmH₂O) to Kilopounds per Square Inch (ksi) instantly and accurately.
Conversion Formula
ksi = cmH₂O × 1.422334331e-5
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 Kilopounds per Square Inch
One ksi (kilopound per square inch) = 1,000 psi ≈ 6.895 MPa - the standard engineering stress unit in the US. ASTM A36 structural steel: 36 ksi yield, 58-80 ksi tensile. ASTM A325 high-strength bolts: 92 ksi proof load. AISC steel construction tables, FAA/MIL-SPEC aerospace allowables, and ASME Section VIII pressure vessel design all use ksi. Fracture toughness (K_IC) for steels: 50-200 ksi·√in. Convenient because it keeps large structural stresses as manageable 3-digit numbers. 1 ksi = 6.895 MPa.
Quick Reference Table
| Centimeters of Water (cmH₂O) | Kilopounds per Square Inch (ksi) |
|---|---|
| 1 cmH₂O | 1.422 × 10-5 ksi |
| 2 cmH₂O | 2.845 × 10-5 ksi |
| 5 cmH₂O | 7.112 × 10-5 ksi |
| 10 cmH₂O | 0.000142233 ksi |
| 25 cmH₂O | 0.000355584 ksi |
| 50 cmH₂O | 0.000711167 ksi |
| 100 cmH₂O | 0.00142233 ksi |