Convert foot of water column to pound per square inch
1 ft H₂O = 0.4335275011 psi
1 ft H₂O = 0.434 psi
1 ft H₂O in every pressure unit
| pascal | 2,990 Pa |
| kilopascal | 2.99 kPa |
| megapascal | 0.00299 MPa |
| bar | 0.0299 bar |
| atmosphere | 0.0295 atm |
| millimeter of mercury | 22.4 mmHg |
| pound per square inch | 0.434 psi |
| foot of water column | 1 ft H₂O |
| gigapascal | 0.00000299 GPa |
| kip per square inch | 0.000434 ksi |
| inch of mercury | 0.883 inHg |
| inch of water column | 12 in w.g. |
How the conversion works
Multiply by 0.4335275011 to go from foot of water column to pound per square inch, or divide by it to go back. Every conversion on this site routes through the SI value (Pa) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? pound per square inch to foot of water column — 1 psi = 2.306658741 ft H₂O.
foot of water column to pound per square inch — common values
| 1 ft H₂O | 0.4335275 psi |
| 2 ft H₂O | 0.867055 psi |
| 3 ft H₂O | 1.3005825 psi |
| 5 ft H₂O | 2.1676375 psi |
| 10 ft H₂O | 4.335275 psi |
| 15 ft H₂O | 6.5029125 psi |
| 20 ft H₂O | 8.67055 psi |
| 25 ft H₂O | 10.838188 psi |
| 50 ft H₂O | 21.676375 psi |
| 75 ft H₂O | 32.514563 psi |
| 100 ft H₂O | 43.35275 psi |
| 250 ft H₂O | 108.38188 psi |
| 500 ft H₂O | 216.76375 psi |
| 1000 ft H₂O | 433.5275 psi |
Other pressure conversions
Pa → psikPa → psiMPa → psibar → psiatm → psimmHg → psiinHg → psift H₂O → Pa