—— Engineering Calculator

Pump Shaft Power Calculator

Calculate the shaft power (kW) your pump requires and the correct motor HP to specify. Includes service factor and motor efficiency.

Shaft Power Formula

P (kW) = (Q × H × SG) ÷ (3670 × η)

Flow Rate

m³/hr

Convert from LPM: divide by 16.667Total Dynamic Head

metres

Sum of static head + friction lossesSpecific Gravity

Water = 1.0Pump Efficiency

Typical centrifugal: 60–80%Service Factor

Industry standard: 1.15–1.25Motor Efficiency

Typical IE2 motor: 88–92%

Shaft Power

---kW

Shaft Power

---HP

Required Motor Power

---kW

—— Specify This Motor

Required Motor HP

---HP

Related Resources

Unit Converter MOC Selection Guide Installation Guide All Resources

These tools provide engineering guidance only. Final pump selection should be confirmed with Shubham Industries based on actual duty conditions and site details.