Watts to volts calculator

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Online Watts to volts calculator, Use watts(W) to volts (V) online converter for calculating the volts(V).please input the power(w), time duration(in hr) and click the Calculate button to obtain the result

current type:
power (in watts): W
current( in amps): A
Voltage result in volts: V

How to convert watts to volts?

watts to volts calculation formula in case of DC

The voltage V in volts is equal to the power P in watts, divided by the current I in amps:

V(in Volts) = P(in Watts) / I(in Amps)

So that you can define “volts are equivalent to W(watts) divided by I(amps)

volt = watt(W) / amps(A)

or you express this formula like this

V = W / A

Let’s take an example
Example#1
Calculate the voltage(in volts) where the power(P) is 50 watts,the current flow in the circuit is 5 amps.

V = 50W / 5A = 10V

watts to volts calculation formula in case of AC single phase

The RMS voltage V in volts is equal to the power P in watts, divided by the power factor PF times the phase current I in amps:

V(in Volts) = P(in Watts) / (Power Factor × I(in Amps) )

So that you can say that “voltages are equal to power(in watts) divided by PF times amps(Current in the circuit).

volts(V) = watts(W) / (PF × amps(A))

or You can re-write this formula like this

V = W / (PF × A)

Let’s take an example
Example#2
Find out the RMS(root mean square) voltage(in volts) where
the power(P) is 300 watts and the PF is 0.8 and the current(I) is 4 amps in the electric circuit.
V = 300W / (0.8 × 4A) = 93.75V

watts to volts calculation formula in case of AC three phase

The line to line RMS voltage VL-L in volts is equal to the power P in watts, divided by square root of 3 times the power factor PF times the phase current I in amps:

VL-L(in Volts) = P(in Watts) / (1.732 × Power Factor × I(in Amps) )

So that you can define “volts(V) are equal to power(P) in watts divided by 1.732 times PF times amps(current in the circuit).

volts(V) = watts(W) / (√3 × PF × amps(A))

or you can re-write this formula like this

V = W / (√3 × PF × A)

Let’s take an example
Example#3
Find out the Root Mean Square voltage(V) where the power(P in watts) is 300 watts,
the PF is 0.8 and the current flow in the circuit is 3 amps?
V = 300W / (1.732 × 0.8 × 3A) = 300W/4.1568=72.17V

If the Current(I)= 2 Amp in the circuit then you can easily do the following conversion(DC)

  • 10 watts to volts:-10W/2=5V
  • 15 watts to volts:-15W/2=7.5V
  • 45 watts to volts:-45W/2=22.5V
  • 100 watts to volts:-100W/2=50V
  • 1000 watts to volts:-1000W/2=500V
  • 1500 watts to volts:-1500W/2=750V

For converting watts to volts we must know the current or resistance of the electrical circuit.
We can calculate the voltage without knowing the current or resistance of the circuit. For example,
10 Watts load can be at any voltage level like 1V, 5V, 15V,400V, or any voltage.10 Watts load can have any voltage level.So we can say that 10,15,45,100,1000,1500 watts load can have any voltage level i.e 5V,10V,50V,100V.


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