Pipe Friction Calculator

Calculate friction losses and head loss in piping systems using the Darcy-Weisbach equation

Input Parameters

Typical: 0.1-0.3 mm for steel pipes
1.0 cP at 20°C

Results

Enter values and click "Calculate Friction Loss" to see results.

How to Use

Enter the pipe diameter, length, flow rate, roughness, and water viscosity. The calculator will determine the friction factor, velocity, Reynolds number, head loss, and pressure drop.

Darcy-Weisbach Equation: hf = f × (L/D) × (v²/2g)
Where:
hf = Head loss (m)
f = Friction factor
L = Pipe length (m)
D = Pipe diameter (m)
v = Velocity (m/s)
g = Gravitational acceleration (9.81 m/s²)