Water Pressure Calculator
Calculate static pressure from elevation, friction pressure loss, and resulting dynamic pressure at the outlet.
Inputs
ft
in
ft
GPM
Results
Pressure at Outlet
54 PSI
Elevation Loss4.33 PSI
Friction Loss1.67 PSI
Total Pressure Loss6 PSI
Water Velocity3.63 ft/s
How to Use This Calculator
- Enter Elevation Change (ft) — positive if the outlet is below the source, negative if above.
- Set Pipe Diameter (inches) and Pipe Length (ft).
- Enter Flow Rate (GPM) at the fixture.
- Review Dynamic Pressure at Outlet, Elevation Loss (psi), and Friction Loss (psi).
- If dynamic pressure is below 20 psi, consider a booster pump or larger pipe diameter.
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