How to convert 100 watts to amps

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 = 100W / 12V = 8.3333A

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 = 100W / (1 × 120V) = 0.8333A

For inductive load (like induction motor), the power factor can be approximately equal to 0.8:

amps = 100W / (0.8 × 120V) = 1.0417A

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 = 100W / (1 × 230V) = 0.4348A

For inductive load (like induction motor), the power factor can be approximately equal to 0.8:

amps = 100W / (0.8 × 230V) = 0.5435A

See also