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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
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
What is the voltage in volts when the power consumption is 45 watts and the current flow is 3 amps?
V = 45W / 3A = 15V
AC single phase watts to volts calculation formula
The voltage V in volts is equal to the power P in watts, divided by the power factor PF times the 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
What is the voltage in volts when the power consumption is 330 watts, the power factor is 0.8 and the current is 3.75 amps?
V = 330W / (0.8 × 3.75A) = 110V
AC three phase watts to volts calculation formula
The voltage V in volts is equal to the power P in watts, divided by square root of 3 times the power factor times the current I in amps:
V(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
What is the voltage in volts when the power consumption is 330 watts, the power factor is 0.8 and the current flow is 2.165 amps?
V = 330W / (√3 × 0.8 × 2.165A) = 110V
How to convert volts to watts ►
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