psi to inH2O converter
1 psi = 27.6807 inH2O
And 1 inH2O = 0.0361263 psi. Pounds per square inch to inches of water column.
Formula
inH2O = psi × 27.6807
A reading of 15 psi is 15 × 27.6807 = 415.21 inH2O.
psi to inH2O table
| psi | inH2O |
|---|---|
| 1 psi | 27.6807 inH2O |
| 5 psi | 138.403 inH2O |
| 10 psi | 276.807 inH2O |
| 15 psi | 415.21 inH2O |
| 30 psi | 830.42 inH2O |
| 50 psi | 1,384.03 inH2O |
| 100 psi | 2,768.07 inH2O |
| 500 psi | 13,840.3 inH2O |
| 1,000 psi | 27,680.7 inH2O |
inH2O to psi table
| inH2O | psi |
|---|---|
| 1 inH2O | 0.0361263 psi |
| 5 inH2O | 0.180631 psi |
| 10 inH2O | 0.361263 psi |
| 15 inH2O | 0.541894 psi |
| 30 inH2O | 1.08379 psi |
| 50 inH2O | 1.80631 psi |
About these units
psi (pounds per square inch): US customary pressure: tires, compressed air, hydraulics and water supply.
inH2O (inches of water column): Low duct and furnace pressures, at the conventional 4 °C water reference.
Gauge pressure (psig, barg) is measured relative to the surrounding atmosphere; absolute pressure (psia, bara) is relative to vacuum. Converting units never changes that reference: absolute = gauge + about 14.696 psi (1.01325 bar) at sea level. Stress uses the same units: 1 MPa = 1 N/mm².
Convert inH2O to psi instead · All pressure and stress conversions