Volts to Watts free online calculator

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:

V
A
W

Watts to volts calculator »

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 VL-L in volts (V):

P(W) = 3 × PF × I(A) × VL-L(V)

            ≈ 1.732 × PF × I(A) × VL-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 VL-N in volts (V):

P(W) = 3 × PF × I(A) × VL-N(V)

Watts to volts calculator »


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