Electric power in watts (W) to electric current in amps (A) calculator.

* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12

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

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

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

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

The power factor of resistive impedance load is equal to 1.

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

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

The power factor of resistive impedance load is equal to 1.

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

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

The power factor of resistive impedance load is equal to 1.

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 |

Power (W) | Voltage (V) | Current (A) |
---|---|---|

10 watts | 120 volts | 0.0833 amps |

20 watts | 120 volts | 0.167 amps |

30 watts | 120 volts | 0.250 amps |

40 watts | 120 volts | 0.333 amps |

50 watts | 120 volts | 0.417 amps |

60 watts | 120 volts | 0.500 amps |

70 watts | 120 volts | 0.583 amps |

80 watts | 120 volts | 0.667 amps |

90 watts | 120 volts | 0.750 amps |

100 watts | 120 volts | 0.833 amps |

200 watts | 120 volts | 1.667 amps |

300 watts | 120 volts | 2.500 amps |

400 watts | 120 volts | 3.333 amps |

500 watts | 120 volts | 4.167 amps |

600 watts | 120 volts | 5.000 amps |

700 watts | 120 volts | 5.833 amps |

800 watts | 120 volts | 6.666 amps |

900 watts | 120 volts | 7.500 amps |

1000 watts | 120 volts | 8.333 amps |

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