Engineering Calculators

Pipe Pressure Loss Calculator

Reference data currently covers water from 0-100 °C.

Friction Factor Method

Colebrook-White solves the implicit friction-factor equation by iterating to a converged answer — more exact, but takes marginally longer. Swamee-Jain is a direct (non-iterative) approximation of Colebrook-White, accurate to within about 1% for typical turbulent flow.

Formula Reference

Darcy-Weisbach Head Loss

hf=fLDV22gh_f = f \dfrac{L}{D} \dfrac{V^2}{2g}

Reynolds Number

Re=ρVDμRe = \dfrac{\rho V D}{\mu}

h_f = head loss (m), f = friction factor, L = pipe length (m), D = internal diameter (m), V = velocity (m/s), g = gravitational acceleration, Re = Reynolds number, ρ = fluid density, μ = dynamic viscosity.