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

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

## DC watts to amps calculation

Convert power in watts to current in amperes with our user-friendly calculator. Understand the relationship between power and current seamlessly. Simplify your electrical load calculations with our Watts to Amps Calculator.

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

#### Example

*P* = 200W, *V* = 40V

## AC single phase watts to amps calculation

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.

#### Example

*P* = 2000W, *V* = 110V, *PF* = 0.8

*I* =

2000W0.8×110V

= 22.72727A

## AC three phase watts to amps calculation

#### Calculation with line-to-line voltage

The phase current *I* in amps (A) is equal to the power *P* in
watts (W), divided by the 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.

#### Calculation with a line to neutral voltage

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.

## 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 |

### Watts to amps table (120V)

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 |