Amps to Watts calculator

Enter the current in amps (A), voltage in volts (V), then press the Calculate button to get the result in watts (W).

DC Amps to watts calculation

Current in amps (A)
Voltage in volts (V)

P(W) =I(A) × V(V)

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

AC single phase Amps to watts calculation

Current in amps (A)
Voltage in volts (V)
Power factor (PF)

P(W) = PF × I(A) × V(V)

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

AC three phase Amps to watts calculation

Line to line voltage

Current in amps (A)
Voltage in volts (V)
Power factor (PF)

P(W) = √3 × PF × I(A) × VL-L (V)

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

Line to neutral voltage

Current in amps (A)
Voltage in volts (V)
Power factor (PF)

P(W) = 3 × PF × I(A) × VL-N (V)

The real power P in watts (W) is equal to 3, multiplied by the power factor PF, multiplied by the phase current I in amps (A), multiplied by the line to neutral RMS voltage VL-N in volts (V).

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