Enter your flow rate, head, and efficiency into the calculator to determine your pump’s power requirements.

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## Pump Power Calculation Formula

The following formula is used to calculate the power requirements for your pump.

Power (kW) = (Flow Rate (L/min) * Head (m) * Density (kg/m³) * 9.81) / (Efficiency (%) * 1000)

Variables:

- Power is the power required by the pump (kW)
- Flow Rate is the volume of fluid being pumped (L/min)
- Head is the height to which the fluid is being pumped (m)
- Density is the density of the fluid (kg/m³)
- Efficiency is the efficiency of the pump (%)

To calculate the power, multiply the flow rate by the head, density, and gravitational constant (9.81), then divide by the product of efficiency and 1000.

## What is Pump Power Calculation?

Pump power calculation refers to the process of determining the amount of power required to operate a pump at a certain efficiency, flow rate, and head. Proper pump power calculation ensures the efficient operation of the pump, reduces energy costs, and helps in selecting the right pump for specific applications.

## How to Calculate Pump Power?

The following steps outline how to calculate the pump power using the given formula.

- First, determine your flow rate, head, and the density of the fluid.
- Next, determine the efficiency of the pump.
- Use the formula from above: Power (kW) = (Flow Rate * Head * Density * 9.81) / (Efficiency * 1000).
- Finally, calculate the power by plugging in the values.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Flow Rate = 200 L/min

Head = 30 m

Efficiency = 75%

Density = 1000 kg/m^{3}

## FAQ

**1. What is flow rate?**

Flow rate is the volume of fluid that moves through a pump in a given period of time, typically measured in liters per minute (L/min).

**2. How is pump efficiency calculated?**

Pump efficiency is the ratio of the hydraulic power delivered by the pump to the mechanical power supplied to the pump. It is expressed as a percentage.

**3. Why is it important to calculate pump power?**

Calculating pump power is important to ensure that the pump operates efficiently, to reduce energy consumption, and to select the right pump for the intended application.

**4. Can this calculator be used for different fluids?**

Yes, you can adjust the density field to match the density of any fluid to calculate the power accordingly.

**5. Is the calculator accurate?**

The calculator provides an estimate of the pump power based on the inputs provided. For exact figures, it’s best to consult technical documentation or a specialist.