FluidFlow Blogs: March 19, 2026

Darcy-Weisbach Equation: Calculating Pressure Drop in Pipes The Darcy-Weisbach equation is the standard method for calculating frictional pressure drop in pipe flow. It applies to any Newtonian fluid, any pipe material, and any flow regime. Most other pressure drop methods are either simplifications of Darcy-Weisbach or limited to specific fluids. This page covers the equation,…