How to convert watts to volts

How to convert electric power in watts (W) to electrical voltage in volts (V).

You can calculate volts from watts and amps, but you can't convert watts to volts since watts and volts units do not measure the same quantity.

DC watts to volts calculation formula

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

V(V) = P(W) / I(A)

So volts are equal to watts divided by amps.

volt = watt / amp

or

V = W / A

Example 1

What is the voltage in volts when the power consumption is 35 watts and the current flow is 3 amps?

V = 35W / 3A = 11.666V

Example 2

What is the voltage in volts when the power consumption is 55 watts and the current flow is 3 amps?

V = 55W / 3A = 18.333V

Example 3

What is the voltage in volts when the power consumption is 100 watts and the current flow is 3 amps?

V = 100W / 3A = 33.333V

AC single phase watts to volts calculation formula

So 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(V) = P(W) / (PF × I(A) )

So volts are equal to watts divided by power factor times amps.

volts = watts / (PF × amps)

or

V = W / (PF × A)

Example 1

What is the RMS voltage in volts when the power consumption is 220 watts, the power factor is 0.8 and the phase current is 3.75 amps?

V = 220W / (0.8 × 3.75A) = 73.333V

Example 2

What is the RMS voltage in volts when the power consumption is 320 watts, the power factor is 0.8 and the phase current is 3.75 amps?

V = 320W / (0.8 × 3.75A) = 106.66V

Example 3

What is the RMS voltage in volts when the power consumption is 420 watts, the power factor is 0.8 and the phase current is 3.75 amps?

V = 420W / (0.8 × 3.75A) = 140V

AC three phase watts to volts calculation formula

So 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(V) = P(W) / (√3 × PF × I(A) )

So volts are equal to watts divided by square root of 3 times power factor times amps.

volts = watts / (√3 × PF × amps)

or

V = W / (√3 × PF × A)

Example 1

What is the RMS voltage in volts when the power consumption is 220 watts, the power factor is 0.8 and the phase current flow is 2.165 amps?

V = 220W / (√3 × 0.8 × 2.165A) = 73.335V

Example 2

What is the RMS voltage in volts when the power consumption is 320 watts, the power factor is 0.8 and the phase current flow is 2.165 amps?

V = 320W / (√3 × 0.8 × 2.165A) = 106.669V

Example 3

What is the RMS voltage in volts when the power consumption is 420 watts, the power factor is 0.8 and the phase current flow is 2.165 amps?

V = 420W / (√3 × 0.8 × 2.165A) = 140.004V

 

How to convert volts to watts ►

 

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