How to convert electric power of 1 watt (W) to electric current in amps (A).
You can calculate (but not convert) the amps from watts and volts:
For DC power supply, amps are equal to watts divided by volts.
amp = watt / volt
amps = 1W / 12V = 0.083333A
For AC power supply, amps are equal to watts divided by power factor times volts.
amps = watts / (PF × volts)
For resistive load without inductors or capacitors, the power factor is equal to 1:
amps = 1W / (1 × 120V) = 0.008333A
For inductive load (like induction motor), the power factor can be approximately equal to 0.8:
amps = 1W / (0.8 × 120V) = 0.010417A
For AC power supply, amps are equal to watts divided by power factor times volts.
amps = watts / (PF × volts)
For resistive load without inductors or capacitors, the power factor is equal to 1:
amps = 1W / (1 × 230V) = 0.004348A
For inductive load (like induction motor), the power factor can be approximately equal to 0.8:
amps = 1W / (0.8 × 230V) = 0.005435A
How to convert watts to amps ►