Input voltage in volts (V).
Input current in amperes (A).
Input power factor (PF). This should be a number between 0 and 1.
Select the load type: resistive, inductive, or capacitive.
Select phase configuration: single phase or three phase.
Click Calculate to calculate the result.
How does it calculate the result?
The power calculator calculates the following values:
Apparent power (VA): This is the product of voltage and current. For a three-phase power supply, this is multiplied by the square root of 3.
Active power (W): This is the apparent power times the power factor.
Reactive power (VAR): This depends on the type of load:
For resistive loads, the reactive power is 0.
For inductive loads, the reactive power is positive and calculated as the square root of the difference between the square of the apparent power and the square of the actual power.
For capacitive loads, reactive power is negative and calculated in a similar way to inductive loads.
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The power calculator assumes load balancing and ideal conditions, which may not always be the case in reality. The results should be used for reference purposes; critical applications may require further validation.
Use cases for this calculator
Calculate your monthly electricity consumption.
As a homeowner, you want to keep track of your electricity usage to manage your budget effectively. By entering your appliance power and usage time into the power calculator, you can estimate your total monthly electricity consumption, helping you make informed energy use choices.
Determine the cost of operating the equipment.
With a power consumption calculator, you can easily find out how much it costs to run your favorite appliance. Simply enter wattage and local electricity prices to see the estimated monthly cost of each unit, allowing you to prioritize energy efficiency.
Assess the electricity requirements for renovation.
If you are planning a home renovation, you may need to assess the electricity needs of new appliances or fixtures. Calculators can help you determine if your current electrical system can handle the additional load, ensuring you avoid potential overloads or electrical failures.
Compare the energy efficiency of electrical appliances
You are interested in upgrading your appliances but want to make sure they are energy efficient. By entering the specifications of old and new appliances into the power calculator, you can compare their energy consumption and operating costs, helping you make environmentally friendly choices.
Calculate the power factor of the motor.
When dealing with motors in your business, understanding the power factor is critical to efficiency. The calculator enables you to analyze input power, output power, and power factor, giving you a clearer picture of how efficiently the motor works under load.
Assess battery requirements for off-grid living.
If you're considering an off-grid lifestyle, you need to figure out the power needs of all your devices. This power calculator can help you estimate the total watt-hours you need per day to help you choose the right batteries and solar panels for your sustainable living setup.
Generator selection plan
When buying a generator, you want to make sure it can meet your backup power needs without wasting energy. By assessing the power of all basic appliances, the calculator gives you recommendations on the right generator size to ensure you are prepared for power outages.
Monitoring power trend
Understanding changes in power consumption can help you identify areas for improvement. Using a power calculator on a regular basis allows you to track trends over time, making it easier to identify spikes in usage or potential issues with your device that may require your attention.
Estimating the size of the solar System
If you're thinking about installing solar panels, you'll want to know how many panels you'll need. By entering your average energy consumption into the calculator, you can get an estimate of the size of your required solar system, simplifying the planning process for your renewable energy solution.
Understand the load distribution in circuit breakers
To maintain a safe home environment, understanding the load distribution is essential. The power calculator allows you to input fan, lighting, and socket loads to ensure your circuit breakers are the right size to reduce the risk of tripping or electrical hazards in your space.