Darcy-Weisbach Equation Calculator

Head Loss (h_f):

Darcy Friction Factor (f):

Length of pipe (L):

Diameter of the pipe (D):

Flow velocity (v):

Gravitational Acceleration (g):

How This Is Calculated

$$ h_f = f \cdot \frac{L}{D} \cdot \frac{v^2}{2g} $$ where:

h_f = Head Loss (m)

f = Darcy Friction Factor (dimensionless)

L = Length of pipe (m)

D = Diameter of the pipe (m)

v = Flow velocity (m/s)

g = Gravitational Acceleration (m/s²)

Assumptions

The fluid is incompressible and Newtonian.
The fluid is in a steady flow.
The flow is fully developed.
There are no significant local energy losses.

Related Calculators

Continuity

Flow Rate

Flow Rate Through an Orifice

Force on a Fluid in a Control Volume

Head Difference Between Two Ends of a Pipe