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Pump power
Estimate shaft power from flow, head, density and pump efficiency.
Equation and assumptions
Pshaft = ρ g Q H / η; QSI = Q / 3600; η = efficiency / 100
Steady incompressible flow. Pump efficiency excludes motor/drive losses. Head must already represent the required total pump head. g = 9.80665 m/s².
The source below supports the underlying unit, mass-balance or hydraulic method. It does not validate this software or a proposed engineering design.
U.S. Department of Energy — Fluid flow fundamentalsUse for preliminary screening. Verify inputs, physical assumptions and results independently before engineering design, operational changes or safety decisions.
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