Friction loss with editable C-factor.
SI empirical formula for water distribution friction loss. Default C = 150 is a common smooth-plastic engineering reference — not an ALFA lab certificate.
Q in m³/s, D in m, L in m → hf in m. This tool accepts Q in L/s and D in mm.
What it calculates: Hazen–Williams calculator results for preliminary design discussion. Outputs are educational aids — validate against project codes and manufacturer data before construction.
Empirical head-loss relationship commonly used for water distribution at typical municipal temperatures.
Flow, diameter, length, Hazen–Williams C coefficient. C is an assumption — confirm for material and aging.
Not a substitute for Darcy–Weisbach when fluid, temperature or roughness fall outside typical water-distribution use.
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