Hazen–Williams Calculator
Estimate head loss in a pipe using the Hazen–Williams empirical formula.
Input Data
Flow Rate
m³/s
Roughness Coefficient
Diameter
m
Pipe Length
m
Results
h_f = 10.67 L Q^1.852/(C^1.852 D^4.87).
5.2008m
At a glance:h_f = 10.67·L·Q^1.852/(C^1.852·D^4.87) (empirical, water). Complements darcy-weisbach and reynolds-number.
Formula
h_f = 10.67·L·Q^1.852/(C^1.852·D^4.87).
$$h_f = \dfrac{10.67\,L\,Q^{1.852}}{C^{1.852}\,D^{4.87}}$$How to Use
- Enter Q, C, diameter and length.
- The tool returns head loss.
Case Studies
Q=0.01, C=140, D=0.1, L=100
h_f ≈ 0.21 m.
FAQ
C values?
PVC ~150, new steel ~140, old cast iron ~100.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.