How to convert electric current of 100 amps (A) to electric power in watts (W).
You can calculate (but not convert) the watts from amps and volts:
100A to watts calculation with voltage of 12V DC
For DC power supply, watts are equal to amps times volts.
watts = amps × volts
watts = 100A × 12V = 1200W
100A to watts calculation with voltage of 120V AC
For AC power supply, watts are equal to the power factor times amps times volts.
watts = PF × amps × volts
For resistive load without inductors or capacitors, the power factor is equal to 1:
watts = 1 × 100A × 120V = 12000W
For inductive load (like induction motor), the power factor can be approximately equal to 0.8:
watts = 0.8 × 100A × 120V = 9600W
100A to watts calculation with voltage of 230V AC
For AC power supply, watts are equal to the power factor times amps times volts.
watts = PF × amps × volts
For resistive load without inductors or capacitors, the power factor is equal to 1:
watts = 1 × 100A × 230V = 23000W
For inductive load (like induction motor), the power factor can be approximately equal to 0.8:
watts = 0.8 × 100A × 230V = 18400W