Watts to Volts – Online calculator, some examples, table and formula

With this tool you can calculate and convert in 1 only step from Watts to volts easily and for free.

You will also find the formula used to convert watts to volts, how to convert watts to volts, some illustrated examples and a table with the main conversions from watts to volts, with the most common power factor values in different constructions, appliances and motors.

Formula to convert, calculate and transform from watts to volts, single-phase, two-phase and three-phase:

formula watts to volt

  • W DC = Watts DC.
  •  = Watts 1 monophasic.
  •  = Watts 2 biphasic.
  •  = Watts 3 three-phase.
  • L-N = Volts line-neutral.
  • L-L = Volts line-line.
  • AC1Ø = Current / monophase Amps.
  • AC2Ø = Current / Biphasic Amps.
  • AC3Ø = Current / Three- phase Amps.
  • FP = Power factor.

How to convert from watts to volts in 1 only step:


Step 1:

In order to perform this conversion you must have the following variables: Current, power factor, and watts. It is easy to divide the watts between the multiplication of the current, the power factor and the root of three, this for the case of three-phase powers. By example: A coffee machine has a power of 3400watts, an amperage of 11,15amp and a power factor of 0.8, which you must do by dividing 3400watt between the multiplication of √3 × 11,15 × 0,8, According to the following formula: 3400 / (√3 × 11.15 × 0.8), the result will be: 220 Volts.

Examples of conversions from watts to volts:

Example 1:

A monofasico sound equipment has a power of 400watts, with a power factor of 0.93, an amperage of 3.58Amp, the only thing you should do is divide the watts by multiplying the rest of the variables as follows: 400 / (3.58 × 0.93) = 120Volt.

Example 2:

A biphasic ceiling fan has a power of 830Watts, with a power factor of 0.91 and an amperage of 3.8Amp, to find the voltage it should be divided 830 between the multiplication of 2 × 0.91 × 3.8, which will result in: 120Volts.

Example 3:

A three-phase industrial washing machine has a power of 2450watts, a power factor of 0.78 and an amperage of 8.24Ampere, to know the voltage you should divide 2450 / (√3 × 8.24 × 0.78) = 220volts.

Watts to volts, table, equivalence, transformation (Amperes = 10Amp, Fp = 0.8, AC, 3F):

How many Watts are:Equivalence in Volts
100 WattsEquivalent to 7.22 Volts
200 Watts14.43 Volts
300 Watts21.65 Volts
400 Watts28.87 Volts
500 Watts36.08 Volts
600 Watts43.30 Volts
700 Watts50.52 Volts
800 Watts57,74 Volts
900 Watts64.95 Volts
1000 Watts72.17 Volts
2000 Watts144.34 Volts
3000 Watts216.51 Volts
4000 Watts288.68 Volts
5000 Watts360.84 Volts
6000 Watts433.01 Volts
7000 Watts505.18 Volts
8000 Watts577.35 Volts
9000 Watts649.52 Volts
10000 Watts721.69 Volts
20000 Watts1443.38 Volts
30000 Watts2165.06 Volts
40000 Watts2886.75 Volts
50000 Watts3608.44 Volts
60000 Watts4330.13 Volts
70000 Watts5051.81 Volts
80000 Watts5773.50 Volts
90000 Watts6495.19 Volts

Note: The previous conversions take into account a power factor of 0.8, an amperage of 10 Amp and a three-phase AC power. For different variables you should use the calculator that appears at the beginning.

Typical power factor for engines, constructions and appliances.

Typical Un-improved Power Factor by Industry:

IndustryPower Factor
Auto Parts0.75-0.80
Coal Mine0.65-0.80
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
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
Digital Picture Frame0,73
Xbox Kinect0,75
Xbox 3600,78
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

How to use the watt-to-volt calculator:

Initially you must have the watts you want to convert and the amps and power factor, with that in mind you must go to the initial table and choose the type of current you want AC or DC and the number of phases in case of choosing AC, then you must enter the data shown on the left side of the tool, it is important to check what is requested in the table because according to the requirement you must enter watts 1F, 2F, 3F, then you must enter the factor of power and finally the amperage.

Rating calculator from Watts to Volts:  [kkstarratings]