For educational use only — not for projects without review by a qualified professional engineer. The author takes no liability.
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.
Economics (optional)
Default electricity price is BC Hydro (~$0.14/kWh CAD); change it for your region. Operating cost assumes continuous running (8760 h/yr) at the duty-point power. Pump purchase cost is an order-of-magnitude estimate from a published cost correlation.
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
