FREE Hydraulic Hose Size, Pressure Drop and Calculator Written by Corey Rasmussen in Calculators,Hydraulics,Stress Flow / Hand Calcs Last Updated March 24, 2023 Oil Type ISO 22ISO 32ISO 46ISO 68 Equivalent Roughness, ε (ft)(0.0001 - 0.00015) Operating Temp °F Density (lb/gal) Flow, Q (gpm) Kinematic Viscosity (cS) Length, L (ft) Dynamic Viscosity (cP) Hose Size(in) Hose Area(in^2) Velocity(ft/s) ReynoldsNumber RelativeRoughness FrictionCoefficient PressureDrop (psi) Power(hp)