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Fluid engineering, Advanced
Pump Power
Required shaft power for a centrifugal pump
Formula: shaft_power = ρgQH ÷ efficiency
Shaft power required to drive a centrifugal pump given fluid density, flow rate, head, and pump efficiency. Use to size motor selection and check that an installed pump isn't oversized.
Inputs
Results
Required Shaft Power
19,580.76 W
Recommended next actions
- →Use VFD to match actual demand and improve efficiency
- →Check NPSH-available against pump's NPSH-required
Turn this result into an action plan
Send the calculation to your inbox or book a review if the numbers point to cost, compliance, or uptime risk.
Formula
shaft_power = ρgQH ÷ efficiencyWorked example
Inputs
density998
flow_rate0.05
head30
efficiency0.75
Outputs
shaft_power19581
Use for estimation. Verify safety-critical calculations with qualified review.