Conversion Formula
$$ftH₂O = psi \times 2.30666$$
Multiply the value in Pound per Square Inch by 2.30666 to get Foot of Water.
psi to ftH₂O Conversion Table
| Pound per Square Inch (psi) | Foot of Water (ftH₂O) |
|---|---|
| 0.1 | 0.230666 |
| 0.5 | 1.15333 |
| 1 | 2.30666 |
| 2 | 4.61332 |
| 5 | 11.5333 |
| 10 | 23.0666 |
| 25 | 57.6665 |
| 50 | 115.333 |
| 100 | 230.666 |
| 250 | 576.665 |
| 500 | 1,153.33 |
| 1,000 | 2,306.66 |
psi to ftH₂O in Engineering
Pressure conversions are essential across all engineering disciplines — from structural loads (PSI, ksi) to fluid systems (feet of water, mmHg) to atmospheric science (atm, mbar). Accurate pressure conversion is critical for piping design, HVAC, and geotechnical analysis.
Pound per Square Inch: Primary US customary pressure unit. Used extensively in mechanical, civil, and petroleum engineering in the United States.
Foot of Water: Used for pump head calculations in US customary units. Critical for water system design and pump selection.