Watts to Volts Calculation  Online Electrical Calculators
Watts (W) to Volts (V) Conversion Calculator.
Enter the Real Power (P) in Watts (W), Current (I) in amps (A), and press the calculate button to get the Voltage (V) in volts (V):
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Note, For higher values like 5×10^{3}, 10×10^{6}, 1.6 x10^{12}, enter the value like this for scientific notation as 5e3, 10e6, 1.6e12, etc.
Conversion Using the Power Formula :
DC Watts to Volts Calculation:
The voltage (V) in volts (V) is equal to the Real Power (P) in Watts (W), divided by the Current (I) in amps (A):
For example, let’s convert 40 watts to volts using a DC circuit with 6 amps of current.
V_{(V)} = 40 ÷ 6
V_{(V)} = 6.667 V
AC Single Phase Watts to Volts Calculation:
The RMS voltage (V) in volts (V) is equal to the Real Power (P) in watts (W), divided by the power factor (PF) times the phase Current (I) in amps (A):
For example, let’s convert 1,200 watts to voltage for an AC electrical circuit with 8 amps of current and a power factor of 0.8.
V_{(V)} = 1500 ÷ 0.8 x 8
V_{(V)} = 234 V
Ac Three Phase Watts to Volts Calculation :
Calculation with Line to Line Voltage:
The linetoline RMS voltage V_{LL} in volts (V) is equal to the Real power (P) in watts (W), divided by the square root of 3 times the power factor (PF) times the phase current (I) in amps (A):
For example, let’s convert 500 watts to volts for an AC Electrical circuit with 10 amps of current and a power factor of 0.8.
V_{(V)} = 500 ÷ √3 x 0.8 x 10
V_{(V)} = 36 V
Calculation with Line to Neutral Voltage:
The line to neutral RMS voltage (V) _{LN} in volts (V) is equal to the Real power (P) in watts (W), divided by 3 times the power factor (PF) times the phase current (I) in amps (A):
For example, let’s convert 1,100 watts to voltage for an AC electrical circuit with 12 amps of current and a power factor of 0.8.
V_{(V)} = 1100 ÷ 3 x 0.8 x 12
V_{(V)} = 17 V
Where:

 P = Power in watts
 V = Voltage in volts
 I = Current in amperes
 Cosθ = Power factor in AC circuits
 V_{LL} = Line to Line Voltage in 3Phase Circuits
 V_{LN} = Line to Neutral Voltage in 3Phase Circuits
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How to use This Calculator?
To use the above “Watts to Volts Conversion Calculator” follow the below steps:
01. Select Phase Type: Choose between ” DC Line” “Single Phase” or “3 Phase” by choosing the appropriate option from the dropdown.
02. Enter Real Power: Input the Real Power in watts or motor watts value in the specific input box. You can enter the value in watts or kilowatts by choosing the appropriate option from the dropdown.
03. Enter Current: Input the Current in Amps value in the specified input box. You can enter the value in A or KA by choosing the appropriate option from the dropdown.
04. Select Voltage Type: Choose between “Line to Line Voltage” or “Line to Neutral Voltage” by choosing the appropriate option from the dropdown.
05. Enter Power Factor: Input the power factor of the motor in the provided input box. The power factor is a unitless value typically between 0 and 1.
06. Reset: If you want to “reset” the calculator to perform another conversion, you can click the “Reset” button, and all input fields will be cleared.
07. Calculate: Click the “Calculate” button to obtain the results. The calculated results will be displayed in the “Results:” section.
08. Swap: If you want to “Swap” the calculated to Exchange conversion, you can click the “Swap” button, and Calculate will be Exchange.
09. Result: The calculated “result” will be displayed in the respective “Result In volts (V)” output field.
Watts to Volts Conversion table:
Power (W)  Voltage (V)  Current (A) 

10 watts  220 volts  0.045 amps 
20 watts  220 volts  0.090 amps 
30 watts  220 volts  0.136 amps 
40 watts  220 volts  0.181 amps 
50 watts  220 volts  0.227 amps 
60 watts  220 volts  0.272 amps 
70 watts  220 volts  0.318 amps 
80 watts  220 volts  0.363 amps 
90 watts  220 volts  0.409 amps 
100 watts  220 volts  0.454 amps 
200 watts  220 volts  0.909 amps 
300 watts  220 volts  1.363 amps 
400 watts  220 volts  1.818 amps 
500 watts  220 volts  2.272 amps 
600 watts  220 volts  2.727 amps 
700 watts  220 volts  3.181 amps 
800 watts  220 volts  3.636 amps 
900 watts  220 volts  4.090 amps 
1000 watts  220 volts  4.545 amps 
Device  Typical PF 

Resistive Load  1 
Fluorescent Lamp  0.95 
Incandescent Lamp  1 
Induction Motor full load  0.85 
Induction Motor no Load  0.35 
Resistive Oven  1 
Synchronous Motor  0.9 
Power Factor Value conversion table 
Frequently asked questions
A measured in volts (V), stands as a fundamental concept in the realm of electronics, representing the electrical pressure that propels current flow through a circuit.
Volt is the measure of potential difference within 2 terminals of a conducting wire. A Watt is the rate at which electrical working is performed when a current of 1 ampere flows across the potential difference of 1 volt.
The wattage in one amp depends on the voltage of the system. Using the formula for DC conversion: Watts = Amps x Volts, at 120 volts, 2 amps would equal 240 watts. Remember, the relationship between amps and watts is directly influenced by the voltage.
1 ampere is the current in which one coulomb of charge travels across a given point in 1 second. That's why an average lightning bolt carries around 5 coulombs of charge, even though its current may be tens of thousands of amps.
Power factor is defined as the ratio of the average power supply in an AC circuit to the apparent power, which is the product of the voltage and current magnitudes. (1.77) Power factor = average power apparent power = p S. Power factor (PF) has a value between 0 and unity.