Enter the power in watts (W), voltage in volts (V), select power factor (PF) from 0 to 1 with a 0.1 step (for AC), then press the Calculate button to get the result in amps (A).
DC watts to amps calculation
I(A) = P(W) / V(V)
The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V).
AC single phase watts to amps calculation
I(A) = P(W) / (PF × V(V))
The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF, multiplied by the RMS voltage V in volts (V).
AC three phase watts to amps calculation
Line to line voltage
I(A) = P(W) / (√3 × PF × VL-L(V))
The phase current I in amps (A) is equal to the power P in watts (W), divided by square root of 3, multiplied by the power factor PF, multiplied by the line to line RMS voltage VVL-L in volts (V).
Line to neutral voltage
I(A) = P(W) / (3 × PF × VL-N(V))
The phase current I in amps (A) is equal to the power P in watts (W), divided by 3, multiplied by the power factor PF, multiplied by the line to neutral RMS voltage VVL-N in volts (V).