# Darcy Weisbach Head Loss Equation & Calculator

## Head Loss due to Pipe Friction Calculation

fD - Dercy friction factor
L - Pipe length (m)
D - Hydraulic diameter (m)
V - Fluid flow avg velocity (m/s)

Darcy Weisbach head loss calculator - equation & step by step calculation to find the fluid head loss due to friction between pipe and fluid along the pipe's length. hf = [fD x (L/D) x (V2/2 x g)]. The Darcy friction factor fD, pipe length L in meter, pipe diameter D in meter, fluid flow average velocity V in meter/sec & standard gravity g = 9.81 m/s2 are the key terms of this calculation.

## Formula

In mechanical engineering, the below mathematical formula is used to calculate the fluid head loss due to friction between pipe and fluid.

In the field of mechanical engineering, sometime, it's important to analyse the head loss due to the friction between pipe & fluid along the length. The above formula & step by step calculation may useful for users to understand how the values are being used in the formula to find the head loss, however, when it comes to online for quick calculations, this Darcy Weisbach head loss calculator helps the user to perform & verify such calculations as quick as possible.

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