Plant engineering calculator · Updated 17 September 2026
Boiler Feed Pump Power Calculator — Differential Head, Hydraulic & Motor Power
Calculate boiler-feed-pump differential head, hydraulic power, shaft power and electrical input from flow, suction/discharge pressure, elevation and efficiencies.
Inputs
Live results
- Differential head 132.46453 m
- Hydraulic power 10.392266 kW
- Shaft power 13.856355 kW
- Electrical input 15.061255 kW
Formula
H=ΔP/(ρg)+Δz; Ph=ρgQH; Pelec=Ph/(ηpηm).
Worked example
30 m³/h across 12 bar at 75% pump and 92% motor efficiency needs about 14.5 kW.
Assumptions and limits
- Density is user-entered for hot feedwater.
- Velocity-head and detailed piping losses should be added when material.
FAQs
What does this Boiler Feed Pump Power Calculator calculate?
Calculate boiler-feed-pump differential head, hydraulic power, shaft power and electrical input from flow, suction/discharge pressure, elevation and efficiencies.
What should I verify before final design?
Verify measured operating data, fluid properties, equipment curves, safety margins and the applicable OEM or engineering standard.
Why are intermediate results shown?
They expose assumptions and make unit, load and operating-condition errors easier to catch.