How to convert 1 amp to watts

How to convert electric current of 1 amp (A) to electric power in watts (W).

You can calculate (but not convert) the watts from amps and volts:

1A to watts calculation with voltage of 12V DC

For DC power supply, watts are equal to amps times volts.

watts = amps × volts

watts = 1A × 12V = 12W

1A 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 × 1A × 120V = 120W

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

watts = 0.8 × 1A × 120V = 96W

1A 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 × 1A × 230V = 230W

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

watts = 0.8 × 1A × 230V = 184W

 

How to convert amps to watts ►

 


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