## DC amps to kilowatts calculation and calculator

The power *P* in kilowatts (kW) is equal to the current *I* in amps (A), times the voltage *V* in volts (V) divided by 1000:

*P*_{(kW)} = *I*_{(A)} × *V*_{(V)} / 1000

## AC single phase amps to kilowatts calculation

The power *P* in kilowatts (kW) is equal to the times the phase current *I* in amps (A), times the RMS voltage *V* in volts (V) divided by 1000:

*P*_{(kW)} = *PF* × *I*_{(A)} × *V*_{(V)} / 1000

## AC three phase amps to kilowatts calculation

#### Calculation with line to line voltage

The power *P* in kilowatts (kW) is equal to square root of 3 times the times the phase current *I* in amps (A), times the line to line RMS voltage *V*_{L-L} in volts (V) divided by 1000:

*P*_{(kW)} = *√*3 × *PF* × *I*_{(A)} × *V*_{L-L (V)} / 1000

#### Calculation with line to neutral voltage

The power *P* in kilowatts (kW) is equal to 3 times the times the phase current *I* in amps (A), times the line to neutral RMS voltage *V*_{L-N} in volts (V) divided by 1000:

*P*_{(kW)} = 3 × *PF* × *I*_{(A)} × *V*_{L-N (V)} / 1000

## Typical power factor values

Do not use typical power factor values for accurate calculations.

Device |
Typical power factor |

Resistive load |
1 |

Fluorescent lamp |
0.95 |

Incandescent lamp |
1 |

Induction motor full load |
0.85 |

Induction motor no load |
0.35 |

Resistive oven |
1 |

Synchronous motor |
0.9 |