Pump Shaft Power Calculator

This calculator helps you determine the shaft power required for a pump based on flow rate, head, and efficiency.

Input Parameters

Calculation Results

Calculation Formula

P = (Q × H × ρ × g) / (η / 100)

Where:
P = Shaft Power (W)
Q = Flow Rate (m³/s)
H = Head (m)
ρ = Density of fluid (kg/m³) - typically 1000 kg/m³ for water
g = Acceleration due to gravity (9.81 m/s²)
η = Efficiency (%)

Pump Shaft Power Calculator Usage Guide

Learn how to use the Pump Shaft Power Calculator and its working principles

How to Use the Calculator

  1. Enter the flow rate (Q) in cubic meters per second (m³/s).
  2. Enter the head (H) in meters (m).
  3. Enter the efficiency (η) as a percentage.
  4. Click the "Calculate" button to compute the shaft power.
  5. The shaft power (P) will be displayed in watts (W).

Understanding the Formula

The shaft power required for a pump is calculated using the formula:

P = (Q × H × ρ × g) / (η / 100)

Where:

  • P = Shaft Power (W)
  • Q = Flow Rate (m³/s)
  • H = Head (m)
  • ρ = Density of fluid (kg/m³) - typically 1000 kg/m³ for water
  • g = Acceleration due to gravity (9.81 m/s²)
  • η = Efficiency (%)

This calculator is particularly useful for engineers and technicians involved in pump selection and system design.