Determine the volumetric fluid flow rate through pipes with our easy-to-use Hazen-Williams calculator. Input pipe diameter, length, Hazen-Williams roughness coefficient (C-factor), and head loss to quickly find the flow rate. Essential for hydraulic engineers and anyone working with water distribution systems, ensuring accurate pipe sizing and system performance analysis.
Formula:
The Hazen-Williams equation is an empirical formula used to calculate the head loss due to friction in a pipe, or conversely, the fluid flow rate. For calculating flow rate (Q), the common form derived from the head loss equation (using US Customary units for the constant) is:
Q = 0.849 × C × D2.63 × (hf / L)0.54Where:
Q= Volumetric Fluid Flow Rate (e.g., GPM, ft³/s, m³/s)C= Hazen-Williams Roughness Coefficient (dimensionless, depends on pipe material)D= Pipe Hydraulic Diameter (e.g., inches, feet, mm, meters)hf= Head Loss due to friction over the pipe length (e.g., feet, meters)L= Length of the Pipe (e.g., feet, meters)
This formula is primarily used for water flow in piping systems under turbulent flow conditions.