# Watts-VA to FP (power factor) – Formula 3 phase, conversion, calculator

With this calculator you can easily and quickly convert from Watts-VA to PF (power factor).

In addition to the calculator, there is the formula from Watts-VA to PF (power factor), descriptive examples are also shown, the main equivalences in a table and finally the steps for the conversion.

Table content:

## Watts-VA to Power factor calculation formula:

• Watts=Watt is the unit of power (symbol: W).
• VA=Volt-Ampere.
• P.F=Power factor

## Step 1.

Divide Watts between VA, for example, if you have a microwave that consumes 1000Watts and 1200VA, you must divide 1000watts between 1200VA, the result will be a power factor of 0.83.  (1000Watts /1200VA = 0,83)

## Definition P.F, S (VA) and P (kW):

Watts: is Working Power (also called Actual Power or Active Power or Real Power). It is the power that actually powers the equipment and performs useful work.

The real power in watts is the power that performs work or generates heat. Power in watts is the rate at which energy is consumed (or generated). One watt is one joule (energy) per second (1 W = 1 J/s).

Resistive devices or loads such as heaters, incandescent lamps are rated in Watts.

VA: A Volt-ampere, commonly referred to as a VA, is commonly used as a unit of power in obtaining the electrical capacity of circuit breakers, uninterrupted power supplies and wirings.

VA is larger than Watts because loads are inductive such as motors, discharge lighting, reactors and more current is required to keep the magnetic field energized than is -turned into heat (Watts).

Inductive devices or loads such,. as tansformers and motors having power factor less than 1.0 are generally rated in VA.

P.F: Power factor is the ratio of working power to apparent power. It measures how effectively electrical power is being used. A high power factor signals efficient utilization of electrical power, while a low power factor indicates poor utilization of electrical power.

Power Factor is the cosine of the phase angle between current and voltage.
Power Factor is the ratio of true power to apparent power.

## Typical Motor Power Factors:

Reference // Power Factor in Electrical Energy Management-A. Bhatia, B.E.-2012
Power Factor Requirements for Electronic Loads in California- Brian Fortenbery,2014
http://www.engineeringtoolbox.com

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