// multi-utility computation suite · offline · instant · precise
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eng.centrifugal-pump-affinity Calculator
Applies the centrifugal pump affinity laws to predict flow, head, and power at a new speed from known performance at a reference speed. The pump affinity laws: Q ∝ N, H ∝ N², P ∝ N³ — reducing pump speed by 20% reduces power by 49%, making VFD control highly energy efficient.
Inputs
Q1 M3Hr
Reference formula or conversion factor shown for context.
H1 M
Reference formula or conversion factor shown for context.
P1 Kw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.