Electrical Power Factor Calculator

Tools - Pcbcupid - Online and Free to use Electrical Power Factor Calculator

The efficiency with which electrical power is used in a circuit is determined by its electrical power factor. It measures the relationship between visible power—which includes reactive power from inductive or capacitive loads—and real power, which does productive work.
The power factor can be represented as a percentage or a decimal, with a value between 0% and 100% or 0 and 1. An increased power factor signifies a more effective use of electrical power.

Evaluating the effectiveness of electrical systems and equipment is the main goal of electrical power factor monitoring.
By optimizing the power factor towards unity, it aids in detecting and minimizing power losses, enhancing energy efficiency, and lowering electricity expenses.


  • Industrial and Commercial Settings
  • Power Quality Improvement
  • Energy Management
  • Renewable Energy Integration
  • HVAC Systems

Understanding Electrical Power Factor:

Real Power (kW): Kilowatts (kW) is the unit of measurement for the real power utilized by the load. It stands for the electricity’s capability to carry out tasks. 

Apparent Power (kVA): This is the total power, expressed in kilovolt-amperes (kVA), that is applied to the load. It encompasses both reactive and actual power. 

Reactive Power (VAR): This apparent power component, expressed in volt-amperes reactive (VAR), is the portion that is not utilized to carry out work. It is in charge of the energy held in the load’s magnetic field. 

Power Factor (PF): This is a numeric figure between 0 and 1 that represents the true power to perceived power ratio. A greater power factor denotes more efficient use of electrical energy. 

Having a high power factor has the following advantages: 

Reduced energy losses: Lower energy bills are the outcome of a high power factor, which lowers energy losses in the transmission and distribution system. 

Increased efficiency: High power factor equipment runs more effectively, lowering the possibility of overheating and extending its life. 

Improved system stability: A high power factor lowers the possibility of harmonic distortion and voltage fluctuations, which aids in maintaining system stability. 

Conversely, a low power factor may result in: 

Increased energy losses: Higher energy expenses are the outcome of increased energy losses in the transmission and distribution system caused by a low power factor. 

Reduced equipment efficiency:Low power factor equipment runs less effectively, which raises the possibility of overheating and shortens its lifespan. 

System instability: System instability brought on by a poor power factor might result in harmonic distortion and voltage swings.

Finding and fixing the low power factor causes, such as the following, is crucial to raising power factor:

Inductive loads:Transformers and other inductive loads like motors might result in poor power factor. Power factor can be raised by correcting these loads with power factor correction capacitors or other methods. 

Harmonics: Non-linear loads can also result in harmonics, which lower power factor. To reduce harmonics and raise power factor, one can employ harmonic filters or alternative techniques. 

Load balancing:Power factor can also be impacted via load balancing, which involves connecting several loads in simultaneously. Power factor can be raised by making sure load balancing is done correctly.

In conclusion, power factor is a crucial component of electrical power systems. Improving power factor requires knowledge of its significance and techniques for maximizing energy efficiency, minimizing energy losses, and preserving system stability. 

This online calculator helps you to compute the power factor (PF) of an AC electrical circuit. The power factor is the ratio of the real power (in KW) to the reactive power (in KVAr) in the circuit.

Note : Don’t end with comma ( , )

Value of Real Power (kW)
Reactive Power (kVAr)


\[Power\; factor= \frac{kW}{\sqrt{(kW)^2 +(kVAr)^2}}\]


  • kW = Real Power
  • kVAr = Reactive Power

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