Pump Power Calculator

⚙

intermediate

Calculate pump power from flow rate and head.

Formula

P = rho x g x H x Q / efficiency

Compare two scenarios side-by-side

Flow Rate

m³/hr

Total Head

Fluid Density

kg/m³

Pump Efficiency

Hydraulic Power

—

Shaft Power

—

Motor Power

—

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About This Calculator & Guide

About the Pump Power Calculator

The Pump Power Calculator is a dedicated tool in our Engineering category designed to help you calculate pump power from flow rate and head in seconds. By automating the underlying mathematics, this utility eliminates manual calculations and provides reliable, instantaneous estimations.

Mathematical Principles & Calculation Steps

To compute the results, the calculation engine processes your custom inputs: Flow Rate (m³/hr), Total Head (m), Fluid Density (kg/m³), Pump Efficiency. Specifically, the calculations are evaluated using the standard relationship: P = rho x g x H x Q / efficiency. All computations are performed locally within your secure browser session, ensuring absolute data privacy and instantaneous updates without any network delay.

Worked Step-by-Step Calculation Example

Worked Example Sandbox

For illustrative purposes, consider the following calculation using our default values. When we initialize the input fields with Flow Rate = 50 m³/hr, Total Head = 20 m, Fluid Density = 1000 kg/m³, Pump Efficiency = 0.75, the client-side calculator processes the numbers to resolve the formula and produce the final outputs: Hydraulic Power = 2.725 kW and Shaft Power = 3.633 kW and Motor Power = 4.872 hp.

How to Use This Calculator

Set Inputs: Adjust the input values: Flow Rate, Total Head, Fluid Density to match your scenario.
Verify Outputs: The outputs: Hydraulic Power, Shaft Power, Motor Power are updated in real-time on your screen.
Iterate: Change values and compare alternative scenarios to find your optimal result.

Frequently Asked Questions

What does the Pump Power Calculator calculator do?+

Calculate pump power from flow rate and head. It is part of the Engineering category on WebCalcSys and provides instant, accurate results. Simply enter your values and the calculator computes the answer in real time — no downloads or sign-ups required.

How do I use the Pump Power Calculator calculator?+

Enter the required values (Flow Rate, Total Head, Fluid Density, Pump Efficiency) into the input fields. The calculator processes your data instantly and displays Hydraulic Power, Shaft Power, Motor Power in real time. You can adjust any input to run what-if scenarios.

What formula does the Pump Power Calculator calculator use?+

This calculator uses the formula: P = rho x g x H x Q / efficiency. It is based on standard engineering principles and is trusted by students, professionals, and educators worldwide.