Watts to amps calculator

Select current type:	DC AC - Single phase AC - Three phase
Enter power in watts:		W
Select voltage type:	Line to line voltage Line to neutral voltage
Enter voltage in volts:		V
Enter power factor:
	Calculate Reset Swap
Current result in amps:		A

Converting watts to amps can be done using the power formula, which states that I = P ÷ E, where P is power measured in watts, I is current measured in amps, and E is voltage measured in volts.

DC watts to amps calculation

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

I_(A) = P_(W) / V_(V)

AC single phase watts to amps calculation

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

I_(A) = P_(W) / (PF × V_(V))

The power factor of resistive impedance load is equal to 1.

AC three phase watts to amps calculation

Calculation with line to line voltage

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

I_(A) = P_(W) / (√3 × PF × V_L-L(V) )

The power factor of resistive impedance load is equal to 1.

Calculation with line to neutral voltage

The phase current I in amps (A) is equal to the power P in watts (W), divided by 3 times the power factor PF times the line to neutral RMS voltage V_L-N in volts (V):

I_(A) = P_(W) / (3 × PF × V_L-N(V) )