Home » Friction Loss Calculator Friction Loss Calculator Pipe Friction Loss Calculator Flow Rate Units: L/s m³/h GPM Pipe Diameter Units: mm inch Flow Rate: Pipe Diameter: Pipe Length (m): Pipe Material: Steel PVC HDPE Copper Fluid Type: Water Oil Glycerin Kinematic Viscosity (cSt): Number of Elbows: Additional Losses (bar): Formula Type: Darcy-Weisbach Hazen-Williams Calculate Results Head Loss: — m Velocity: — m/s Recommendation: —