Replace the parameters with the appropriate values for your application.
The calculator below can be used to calculate the friction coefficient if velocity and kinematic viscosity of the fluid are known.
The friction coefficient can also be estimated with the Moody diagram (SI based):
Download and print Moody Diagram
Download and print simplified Moody Diagram
The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.
The Darcy-Weisbach equation can be used to calculate the major pressure and head loss due to friction in ducts, pipes or tubes.
Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator.
Calculate pressure loss - or head loss - in ducts, pipes or tubes.
Calculate hydraulic diameter for pipes and ducts.
Calculate friction coefficients for laminar fluid flow.
Calculate fluid flow friction coefficients from a Moody diagram.
Air flow - volume and velocity - due to stack or flue effect caused by indoor hot and outdoor cold temperature difference.
Introduction and definition of the dimensionless Reynolds Number - online calculators.
Surface coefficients that can be used to calculate friction and major pressure loss for fluid flow with surfaces like concrete, galvanized steel, corroded steel and more.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!
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