Convert Feet of Water to Pascals
Convert Feet of Water (ftH₂O) to Pascals (Pa) instantly and accurately.
Conversion Formula
Pa = ftH₂O × 2989.06692
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.
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.
Quick Reference Table
| Feet of Water (ftH₂O) | Pascals (Pa) |
|---|---|
| 1 ftH₂O | 2989.07 Pa |
| 2 ftH₂O | 5978.13 Pa |
| 5 ftH₂O | 14945.3 Pa |
| 10 ftH₂O | 29890.7 Pa |
| 25 ftH₂O | 74726.7 Pa |
| 50 ftH₂O | 149453 Pa |
| 100 ftH₂O | 298907 Pa |