Pump Sizing & Power Calculator
Pump head, hydraulic / shaft / motor power and motor sizing for centrifugal pumps
Fluid & Flow
Pump Head
Enter the differential head the pump must develop. Hydraulic power uses this head together with flowrate and SG.
Efficiencies (optional)
Leave blank and the calculator estimates pump efficiency from flowrate and motor efficiency from shaft power using standard centrifugal-pump data.
Fill in all fields to calculate automatically
Fill in the inputs on the left and results will appear here automatically.
Schematic only — not to scale. Standard centrifugal-pump sizing method for early-stage equipment selection.
To see the guide for this calculator, refer to the article below:
Reference: Pump Sizing and Power Calculation Method
Why ChemEngPro?
Throughout my engineering journey, I’ve faced challenges that textbooks don’t prepare you for. I created ChemEngPro to bridge the gap between academic knowledge and real-world engineering practice. Here, I share the tools, insights, and lessons I’ve used in the field—organized into structured, practical courses designed to help you build the skills and confidence needed to grow in your engineering career.
See Available On-Demand Courses!