Head Loss to PSI Converter
Head loss in a piping system represents the energy lost to friction as fluid flows through pipes, fittings, and valves. Converting head loss to pressure drop allows engineers to...
Formula
Source: Engineering Toolbox, Hydraulic Institute Standards | Last reviewed: June 8, 2026
Examples
100 ft
= 43.3 psi
- SG = 1
100 ft head loss of water = 43.3 psi pressure drop
50 ft
= 17.3 psi
- SG = 0.8
50 ft of kerosene (SG 0.8)
10 ft
= 5.2 psi
- SG = 1.2
10 ft head loss of brine (SG 1.2)
Quick Reference Table
| ft head loss | psi pressure drop |
|---|---|
| 5 | 2.17 |
| 10 | 4.33 |
| 25 | 10.83 |
| 50 | 21.65 |
| 100 | 43.3 |
| 200 | 86.6 |
Where is this used?
Hydraulic analysis: determining pressure at any point in a piping network given elevation and friction losses.
Cross-referencing pump head curves with system pressure requirements.
Frequently Asked Questions
What causes head loss in a piping system?
Head loss is caused by pipe friction (dependent on pipe length, diameter, roughness, and flow velocity) and minor losses from fittings, valves, bends, and other flow disturbances.
How does pipe diameter affect head loss?
Head loss is inversely proportional to roughly the fifth power of pipe diameter. Doubling the pipe diameter reduces head loss by approximately 97% for the same flow rate — which is why larger pipes dramatically reduce pumping energy.
How do I account for elevation changes?
Elevation head (static head) is additive with friction head loss. Total head = static lift + friction head loss. This converter handles the conversion of total head (including both components) to pressure.
Reviewed for accuracy
· Last reviewed: June 8, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.