About the Pump Power Calculator Online Free Tool

The Pump Power Calculator Online Free Tool estimates hydraulic power, shaft/input power, and approximate horsepower from flow rate, total head, efficiency, and fluid density. It supports quick pump sizing conversations and sanity checks.

How to Use the Pump Power Calculator Online

1. Enter the required inputs in the fields above using the units shown on the labels.
2. Select any mode, shape, or method options so the calculation matches your scenario.
3. Run the calculation and review the result summary in the output panel.
4. Check the units, assumptions, and project requirements before using the result outside preliminary review.

Choosing Options Correctly

Flow is entered in m^3/h, head in meters, efficiency as a percent, and density in kg/m^3. Use total dynamic head for practical pump checks.

Common Use Cases

• Estimate power required for a known flow and head.
• Compare the impact of pump efficiency on input power.
• Check whether a motor size is in the expected range.

Quick FAQ

What power does this estimate?
It estimates hydraulic and shaft power from flow, head, fluid density, and efficiency.

Does it select a pump?
No. Pump selection still needs a pump curve, NPSH, duty point, motor margin, and operating range review.

Why does efficiency matter?
Lower efficiency means more shaft power is required for the same flow and head.

Should I include all losses in head?
Yes. Include static head, friction loss, fittings, valves, and other system losses in the total dynamic head.