Pump Affinity Laws

Predict pump performance at different speeds using affinity laws

Inputs

Flow at Speed 1 Q₁ (m³/h)

Head at Speed 1 H₁ (m)

Power at Speed 1 P₁ (kW)

Speed 1 N₁ (RPM)

Speed 2 N₂ (RPM)

Enter values to see results

Calculate pump power from flow, head, and efficiency

Calculate Net Positive Suction Head Available (NPSHa)

Calculate system head at a given flow (static head + friction)

Calculate specific speed (Ns) for pump type classification