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.

Watts-VA to Power factor calculation formula:

formula from watts va to power factor

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

How to convert Watts-VA to Power factor in only 1 step.

watts va to 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 Un-improved Power Factor by Industry:

IndustryPower Factor
Auto Parts0.75-0.80
Brewery0.75-0.80
Cement0.80-0.85
Chemical0.65-0.75
Coal Mine0.65-0.80
Clothing0.35-0.60
Electroplating0.65-0.70
Foundry0.75-0.80
Forging0.70-0.80
Hospital0.75-0.80
Machine Manufacturing0.60-0.65
Metalworking 0.65-0.70
Office Building0.80-0.90
Oil field Pumping0.40-0.60
Paint Manufacturing0.65-0.70
Plastic0.75-0.80
Stamping0.60-0.70
Steel Works0.65-0.80
Tool, dies, jigs industry0.65-0.75

Typical power factor of common household electronics:

Electronics devicePower Factor
Magnavox Projection TV – standby0,37
Samsung 70″ 3D Bluray0,48
Digital Picture Frame0,52
ViewSonic Monitor0,5
Dell Monitor0,55
Magnavox Projection TV0,58
Digital Picture Frame0,6
Digital Picture Frame0,62
Digital Picture Frame0,65
Philips 52″ Projection TV0,65
Wii0,7
Digital Picture Frame0,73
Xbox Kinect0,75
Xbox 3600,78
Microwave0,9
Sharp Aquos 3D TV0,95
PS3 Move0,98
Playstation 30,99
Element 41″ Plasma TV0,99
Current large, flat-screen television0,96
Windows-mount air conditioner0,9
Legacy CRT-Based color television0,7
Legacy flat panel computer monitor0,64
While-LED lighting fixture0,61
Legacy laptop power adapter0,55
Laser Printer0,5
Incandescent lamps1
Fluorescent lamps (uncompensated)0,5
Fluorescent lamps (compensated)0,93
Discharge lamps0,4-0,6

Typical Motor Power Factors:

PowerSpeedPower Factor
(hp)(rpm)1/2 load3/4 loadfull load
0 – 518000.720.820.84
5 – 2018000.740.840.86
20 – 10018000.790.860.89
100 – 30018000.810.880.91

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

Watts VA to power factor conversion table-chart:

WattsVAP.f
1 Watts1,33 VA0,75 Power factor
10 Watts13,33 VA0,75 Power factor
20 Watts26,67 VA0,75 Power factor
30 Watts40,00 VA0,75 Power factor
40 Watts53,33 VA0,75 Power factor
50 Watts66,67 VA0,75 Power factor
60 Watts80,00 VA0,75 Power factor
70 Watts93,33 VA0,75 Power factor
80 Watts106,67 VA0,75 Power factor
90 Watts120,00 VA0,75 Power factor
100 Watts125,00 VA0,8 Power factor
200 Watts250,00 VA0,8 Power factor
300 Watts375,00 VA0,8 Power factor
400 Watts500,00 VA0,8 Power factor
500 Watts625,00 VA0,8 Power factor
600 Watts750,00 VA0,8 Power factor
700 Watts875,00 VA0,8 Power factor
800 Watts1000,00 VA0,8 Power factor
900 Watts1125,00 VA0,8 Power factor
1000 Watts1250,00 VA0,8 Power factor
2000 Watts2352,94 VA0,85 Power factor
3000 Watts3529,41 VA0,85 Power factor
4000 Watts4705,88 VA0,85 Power factor
5000 Watts5882,35 VA0,85 Power factor
6000 Watts7058,82 VA0,85 Power factor
7000 Watts8235,29 VA0,85 Power factor
8000 Watts9411,76 VA0,85 Power factor
9000 Watts10588,24 VA0,85 Power factor
10000 Watts11764,71 VA0,85 Power factor
20000 Watts23529,41 VA0,85 Power factor
30000 Watts33333,33 VA0,9 Power factor
40000 Watts44444,44 VA0,9 Power factor
50000 Watts55555,56 VA0,9 Power factor
60000 Watts66666,67 VA0,9 Power factor
70000 Watts77777,78 VA0,9 Power factor
80000 Watts88888,89 VA0,9 Power factor
90000 Watts100000,00 VA0,9 Power factor
100000 Watts111111,11 VA0,9 Power factor
200000 Watts222222,22 VA0,9 Power factor
300000 Watts333333,33 VA0,9 Power factor
400000 Watts421052,63 VA0,95 Power factor
500000  Watts526315,79 VA0,95 Power factor
600000  Watts631578,95 VA0,95 Power factor
700000 Watts736842,11 VA0,95 Power factor
800000 Watts842105,26 VA0,95 Power factor
900000 Watts947368,42 VA0,95 Power factor
1000000 Watts1052631,58 VA0,95 Power factor
1100000 Watts1157894,74 VA0,95 Power factor
1200000 Watts1263157,89 VA0,95 Power factor
1300000 Watts1368421,05 VA0,95 Power factor