Water resources and hydraulic engineering · Hydraulic systems

Pump efficiency from useful and input power

Calculate efficiency from the entered useful hydraulic power, input power using the displayed relationship.

Published · R0

Method and scope

η = useful power ÷ input power

Use pump efficiency from useful and input power for educational calculation or a clearly scoped arithmetic estimate. Intended for General educational and planning use.

Inputs
  • Useful hydraulic power — W
  • Input power — W
SOURCE AND LIMITS

Assumptions: Inputs are interpreted in the selected units and normalized to the calculator’s canonical units. This is a scoped estimate under the displayed equation, not a substitute for domain-specific review.

Limitations: Use the method details to review the formula, units, and stated input limits before relying on the result.

Method version 1.0.0 · Unit registry and result provenance are shown after calculation. This tool is limited to the documented scope.
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Calculation

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