Pump Power Calculator
Calculate the ideal hydraulic power transferred to a fluid and the shaft power required after allowing for pump efficiency.
Hydraulic power14.71 kW
Required shaft power19.613 kW
Approx horsepower26.3 hp
How this tool works
Hydraulic power = ρgQH. Required shaft power = hydraulic power ÷ efficiency.
Example
Water at 0.05 m³/s and 30 m head requires about 14.7 kW hydraulic power; at 75% efficiency the shaft demand is about 19.6 kW.
Common questions
Does total head include pipe losses?
It should. Enter the total dynamic head required by the system, including static and friction components when known.
Does this size the motor automatically?
No. Motor selection also needs service factor, starting duty, margins, code requirements and manufacturer data.