Pump Power Calculator
How much power does a pump need for this flow and head?
Single calculationv1.0.0Verified 2026-11-01Runs in your browser
Spec sheet
hydraulic_power · v1.0.0Method
Hydraulic power P = ρ·g·Q·H
- 01
P_hyd = ρ · g · Q · H - 02
P_shaft = P_hyd / η_pump - 03
P_input = P_shaft / η_motor - 04
g = 9.80665 m/s²
Limits — read before relying on it
- Head must be total dynamic head (static + friction + velocity); see the pipe pressure drop calculator for friction.
- Does not size the motor to the next standard rating or add a service factor.
Sources
- Hydraulic power of a pump (fluid mechanics, energy equation)textbook