Pipe Pressure Drop

Calculate pressure drop and head loss in a pipe using Darcy-Weisbach.

Friction Factor f

Pipe Length (m)

Inner Diameter (m)

Velocity (m/s)

Fluid Density (kg/m³)

About this calculator

Darcy-Weisbach: ΔP = f × (L ÷ D) × ρv² ÷ 2. Enter the friction factor (about 0.02 for typical pipes), pipe length, diameter, velocity and fluid density.