Inches of Water to PSI
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inH2O
psi
Quick reference
| Inches of Water (inH2O) | PSI (psi) |
|---|
Formula
PSI = inches of water × 0.036127291
Multiply the inches of water value by 0.03612729087016807 to get psi. To reverse — divide psi by 0.03612729087016807 to get inches of water.
About this conversion
Inches of water column (inH₂O) is used in HVAC and low-pressure measurement, equal to approximately 249 pascals. Learn more →
Pounds per square inch (psi) is an imperial pressure unit widely used in the US for tire pressure, hydraulics, and gas pressure. Learn more →
Source: NIST International Reference