Volts (V) to watts (W) calculator.

Enter the voltage in volts,
current in amps and press the *Calculate* button to get the
power in watts:

## DC volts to watts calculation formula

The power *P* in watts (W) is equal to the voltage *V* in volts (V), times the current *I* in amps (A):

*P*_{(W)} = * V*_{(V)}* *×* I*_{(A)}

## AC single phase volts to watts calculation formula

The power *P* in watts (W) is equal to the power factor *PF* times the phase current *I* in amps (A), times the RMS voltage *V* in volts (V):

*P*_{(W)} = * PF *×* I*_{(A)}* *×* V*_{(V)}

## AC three phase volts to watts calculation formula

#### Calculation with line to line voltage

The power *P* in watts (W) is equal to square root of 3 times the
power factor *PF* times the phase current *I* in amps
(A), times the line to line RMS voltage *V*_{L-L} in volts (V):

*P*_{(W)} = *√*3
× * PF *×* I*_{(A)}* *×* V*_{L-L(V)}

≈ 1.732
× * PF *×* I*_{(A)}* *×* V*_{L-L(V)}

#### Calculation with line to neutral voltage

The power *P* in watts (W) is equal to 3 times the power factor *PF* times the phase current *I* in amps
(A), times the line to neutral RMS voltage *V*_{L-N} in volts (V):

*P*_{(W)} = 3 × * PF *×* I*_{(A)}* *×* V*_{L-N(V)}

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