Amps to Watts conversion

Amps (A) to Watts (W) electric charge conversion calculator and how to convert.

Select current type, enter current in amps, voltage in volts, power factor for AC circuit and press the Calculate button:

A
V
W

DC Amps to Watts calculation

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

P(W) = I(A) / V(V)


AC Single Phase Amps to Watts calculation

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 Amps to Watts calculation

Calculation with line to line voltage

The power P in watts (W) is equal to the 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)

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)


Common power factor values

NOTE: It is NOT recommended to use common power factor values for accurate results.

Device Common power factor
Resistive load1
Fluorescent lamp0.95
Incandescent lamp1
Induction motor full load0.85
Induction motor no load0.35
Resistive oven1
Synchronous motor0.9

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