How to convert electric power in watts (W) to electric current in amps (A).

You can calculate amps from watts and volts. You can't convert watts to amps since watts and amps units do not measure the same quantity.

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)}

So amps are equal to watts divided by volts.

amp = watt / volt

or

A = W / V

What is the current in amps when the power consumption is 330 watts and the voltage supply is 110 volts?

*I* = 330W / 110V = 3A

The phase current *I* in amps (A) is equal to the real 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)}* *
)

So amps are equal to watts divided by power factor times volts.

amps = watts / (*PF* × volts)

or

A = W / (*PF* × V)

What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 110 volts?

*I* = 330W / (0.8 × 110V) = 3.75A

The phase current *I* in amps (A) is equal to the real 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)}* *)

So amps are equal to watts divided by square root of 3 times power factor times volts.

amps = watts / (*√*3
× * PF* × volts)

or

A = W / (*√*3
× * PF* × V)

What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 110 volts?

*I* = 330W / (*√*3
× 0.8 × 110V) = 2.165A

The calculation assumes the loads are balanced.

The phase current *I* in amps (A) is equal to the real power *P* in
watts (W), divided by 3 times the
power factor *PF
*times the line to neutral RMS voltage *V*_{L-0} in volts
(V):

* I*_{(A)} = * P*_{(W)} / (3
× * PF* × * V*_{L-0(V)}* *)

So amps are equal to watts divided by 3 times power factor times volts.

amps = watts / (3
× * PF* × volts)

or

A = W / (3
× * PF* × V)

How to convert amps to watts ►

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