# Watts To Amps Calculator

## Watts To Amps Conversion Calculator

## 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 |

##### Sample Question:

Here is how we can calculate watt to amp. How many amps is 500W?

**Solution :**

__I = P/V__

If we input the P = 500 Watts and V = 120 Volts, we get:

__I = 500 Watts/120 Volt = 4.17 Amps__

Watts: | Amps (at 24V): |
---|---|

1 Watt to amps at 24V: | 42 mA (milliamps) |

10 Watts to amps at 24V: | 420 mA |

50 Watts to amps at 24V: | 2.08 Amps |

100 Watts to amps at 24V: | 4.17 Amps |

200 Watts to amps at 24V: | 8.33 Amps |

300 Watts to amps at 24V: | 12.50 Amps |

400 Watts to amps at 24V: | 16.67 Amps |

500 Watts to amps at 24V: | 20.83 Amps |

600 Watts to amps at 24V: | 25.00 Amps |

### Simple WATT - AMP - VOLT Formula

Converting watts to amps 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.

**Watts = Amps x Volts**

**Volt = Watts / Amps**

**Amps = Watts / Volts**

Each of these quantities are measured using different units:

- Voltage is measured in volts (
**V**) - Current is measured in amps (
**A**) - Power is measured in watts (
**W**)

For example, find the amperage of 1200 watts at 120 volts current = power / voltage current = 1200W / 120V current = 10A

## AC and DC power systems

The labels AC and DC are used to describe the types of current flow in a circuit. For direct current (DC) the electric current flows only in one direction. However, in alternating current (AC) the electric current changes direction at several times per second.

## Single-Phase AC Circuit Watts to Amps Conversion

Converting watts to amps for a single-phase AC circuit with power factor uses a slightly different formula.

I_{(A)} = P_{(W)} / V_{(V)} × PF

## Three-Phase AC Circuit Watts to Amps Conversion

### Using Line to Line Voltage

For three-phase AC circuits where the line to line voltage is known, the formula to convert watts to amps is:

I_{(A)} = P_{(W)} / V_{L-L(V)} × PF × √3

The current *I* in amps is equal to the power *P* in watts divided by the line to line voltage *V* in volts multiplied by the power factor PF multiplied by the square root of 3.

### Using Line to Neutral Voltage

For three-phase AC circuits where the line to neutral voltage is known, the formula to convert watts to amps is:

I_{(A)} = P_{(W)} / V_{L-N(V)} × PF × 3

The current *I* in amps is equal to the power *P* in watts divided by the voltage *V* in volts multiplied by the power factor PF multiplied by 3.