Convert Pascals to Feet of Water
Convert Pascals (Pa) to Feet of Water (ftH₂O) instantly and accurately.
Conversion Formula
ftH₂O = Pa × 0.0003345525633
About Pascals
The pascal (Pa) is the SI unit of pressure - 1 N/m², named after Blaise Pascal (1623-1662). Standard sea-level atmosphere ≈ 101,325 Pa. One pascal is very small: roughly the pressure of a single banknote lying flat. Pascal is simultaneously the SI unit for mechanical stress and elastic modulus: structural steel Young's modulus ~200 GPa; rubber shear modulus ~0.5 MPa. Used universally in fluid mechanics, acoustics, atmospheric science, and materials engineering. 1 Pa = 1 N/m².
About Feet of Water
One foot of water column (ftH₂O) ≈ 2,989 Pa - the US customary equivalent of cmH₂O used in civil and hydraulic engineering. Municipal water supply systems are designed for 40-80 psi head ≈ 92-184 ft; fire suppression sprinkler systems require minimum 7 psi ≈ 16 ft. Well pump specifications, sump pump head ratings, irrigation mainline pressure, and drainage calculations all use feet of head. 1 ft of water = 12 in WC = 0.4335 psi ≈ 2,989 Pa.
Quick Reference Table
| Pascals (Pa) | Feet of Water (ftH₂O) |
|---|---|
| 1 Pa | 0.000334553 ftH₂O |
| 2 Pa | 0.000669105 ftH₂O |
| 5 Pa | 0.00167276 ftH₂O |
| 10 Pa | 0.00334553 ftH₂O |
| 25 Pa | 0.00836381 ftH₂O |
| 50 Pa | 0.0167276 ftH₂O |
| 100 Pa | 0.0334553 ftH₂O |