Pump Efficiency Calculator

Enter value and click on calculate. Result will be displayed.
Select calculator :
 
Water Horsepower (WHP) :
HP
Brake Horsepower (BHP) :
HP
Result:

What is a Pump Efficiency Calculator?
A Pump Efficiency Calculator is a tool used to measure how efficiently a pump converts electrical or mechanical energy into the hydraulic energy needed to move a fluid. It calculates the ratio of the pump’s output power (hydraulic power) to its input power (like electricity or fuel).

The formula for pump efficiency (η) is:

Where:

  • Hydraulic Power is the useful power for moving the fluid and is calculated as:

  • ρ = Density of the fluid (kg/m³)

  • g = Gravitational acceleration (9.81 m/s²)

  • H = Head (height the fluid is lifted, in meters)

  • Q = Flow rate (m³/s)

  • Input Power is the power supplied to the pump, usually measured in kilowatts (kW) or horsepower (HP).

Why use a Pump Efficiency Calculator?

  • Optimize Performance: Identify how well the pump is working and if there’s room for improvement.
  • Reduce Energy Costs: Efficient pumps use less energy, saving on electricity or fuel bills.
  • Maintenance Planning: A drop in efficiency often signals wear, clogs, or mechanical issues.
  • Environmental Impact: Lower energy consumption reduces carbon footprint.

How does it work?

  1. Collect Data:

    • Measure the flow rate (Q) of the fluid being pumped.
    • Determine the head (H) — the height the fluid is lifted or the pressure generated.
    • Find the density (ρ) of the fluid (water is 1000 kg/m³).
    • Record the input power to the pump (from the power meter or motor specs).

  2. Calculate Hydraulic Power: Using the formula for hydraulic power.

  3. Calculate Efficiency: Divide hydraulic power by input power and multiply by 100 to express as a percentage.

When do you use it?

  • During system setup to ensure the pump is operating efficiently from the start.
  • For routine maintenance to track performance over time and detect early signs of issues.
  • When troubleshooting low flow rates, high energy consumption, or pressure problems.
  • In energy audits to identify opportunities for saving power and reducing costs.