FORMULA
Calculation method
Pₕ = ρ × g × Q × H · Pshaft = Pₕ / η
At 100 m³/h, 30 m head and 75% overall efficiency, approximate shaft power is 10.90 kW.
MECHANICAL CALCULATION
Pump Power Calculator
Calculate hydraulic and approximate pump shaft power from flow, total head, fluid density and overall efficiency.
Motor Current CalculatorVoltage Drop CalculatorCable Size Calculator4–20 mA and 0–10 V CalculatorPump Power CalculatorEnergy Consumption Calculator
CALCULATOR
Pump power calculation
Hydraulic power8,18 kW
Approximate shaft power10,90 kW
iThis calculation gives hydraulic and approximate shaft power. Motor selection must be verified with the duty point, pump curve, service factor, fluid and starting conditions.
FREQUENTLY ASKED
About this calculation
Should motor power equal shaft power?
Motor selection should be verified against service factor, duty point, starting conditions and pump manufacturer data, using the next appropriate standard rating.
Why does density matter?
At the same flow and head, a denser fluid requires more hydraulic power.
ENGINEERING NOTE
Fast calculation, clear assumptions, correct interpretation
The tools are intended for preliminary assessment and checking. Alongside each result, we explain the formula, assumptions and field conditions that require attention.
Prepared by: Neo Kontrol Otomasyon · Last technical review: July 2026
OUR REFERENCES
