How to convert Watts to Volts

DC Watts to volts calculation formula

V_(V) = P_(W) / I_(A)

The voltage V in volts (V) is equal to the power P in watts (W), divided by the phase current I in amps (A).

So,

V = W / A
volt = watt / amp

For example:

Power (P) = 60W
Current (I) = 2,5A

Voltage (V) = 60W / 2,5A = 24V

AC single phase watts to volts calculation formula

V_(V) = P_(W) / (PF × I_(A))

The RMS voltage V in volts (V) is equal to the power P in watts (W), divided by the power factor PF, multiplied by the phase current I in amps (A).

So,

V = W / (PF x A)
volt = watt / (PF x amp)

For example:

Power (P) = 60W
Current (I) = 2,5A
PF = 0,7

Voltage (V) = 60W / (0,7 x 2,5A) = 34,29V

AC three phase watts to volts calculation formula

V_L-L(V) = P_(W) / (√3 × PF × I_(A))

The line to line RMS voltage V_VL-L in volts (V) is equal to the power P in watts (W), divided by square root of 3, multiplied by the power factor PF, multiplied by the phase current I in amps (A).

So,

V = W / (√3 × PF x A)
volt = watt / (√3 × PF x amp)

For example:

Power (P) = 60W
Current (I) = 2,5A
PF = 0,7

Voltage (V) = 60W / (√3 × 0,7 x 2,5A) = 19,79V