# Online Amps to Watts Calculator

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# Amps to Watts Calculator

Converting amps to watts can be done using the power formula, which states that I = P ÷ E, where P is power measured in watts, I is current measured in amps, and E is voltage measured in volts.

### DC amps to watts calculation

The power *P* in watts (W) is equal to the current *I* in amps (A), times the voltage *V* in volts (V):

*P*_{(W)} = *I*_{(A)}* *×* V*_{(V)}

## AC single phase amps to watts calculation

The power *P* in watts (W) is equal to the
power factor *PF* times the phase current *I* in amps (A), times the RMS voltage *V* in volts (V):

*P*_{(W)} = * PF *×* I*_{(A)}* *×* V*_{(V)}

## AC three phase amps to watts calculation

#### Calculation with line to line voltage

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

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

#### Calculation with line to neutral voltage

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

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