Friction Loss Calculator

Estimate pressure drop, piping friction losses, head loss, and velocities using the Hazen-Williams or Darcy-Weisbach equations.

1. Piping & Flow Parameters
Nominal Pipe Size
Pipe Wall Schedule
Pipe Material
Hazen roughness (C): 150
FittingL/D RatioQtyEq. Length
90° Standard Elbow3020.7 ft
Ball Valve (Fully Open)30.5 ft
Calculated Pressure DropHazen-Williams
Calculating pressure drop...
TOTAL HEAD LOSS17.46 feet
Head Loss
Pipe Flow & Velocity VisualizerRegime: No Flow
Loading flow loop visualizer...

Detailed Fluid Dynamics

Flow Velocity:
High (Erosion Risk)9.56 ft/s
Actual Inside Diameter (ID):2.067" (52.5 mm)
Total Effective Pipe Length:121.2 ft