With this calculator you can convert from Watts to Amp easily, quickly and free any electric power, the calculation takes into account the power factor.

The calculation takes into account the power factor of the electrical system and give the most common values.

We also show the formula that is used for the conversion and a table with the main conversions from Watts to Amp.

## More information on converting from Watts to Amp:

- Definition P.F, Amperes and P (Watts)
- Watts to Amp calculation formula.
- Typical Un-improved Power Factor by Industry
- Typical power factor of common household electronics
- Typical Motor Power Factors
- Watts to Amp conversion table

**Definition P.F, Amperes and P (Watts):**

**Watts:** is Working Power (also called Actual Power or Active Power or Real Power). It is the power that actually powers the equipment and performs useful work.

The real power in watts is the power that performs work or generates heat. Power in watts is the rate at which energy is consumed (or generated). One watt is one joule (energy) per second (1 W = 1 J/s).

Resistive devices or loads such as heaters, incandescent lamps are rated in Watts.

**Ampere:** Amperage is a term often used by electricians, and means electrical current, measured in amperes, or amps. The ampere is the SI unit for electrical current, or the amount of electrical charge that flows through a conductor in a given time. One ampere is a charge of one coulomb — about 6.241 X 1018 electrons — per second flowing past a given point.

**P.F:** Power factor is the ratio of working power to apparent power. It measures how effectively electrical power is being used. A high power factor signals efficient utilization of electrical power, while a low power factor indicates poor utilization of electrical power.

Power Factor is the cosine of the phase angle between current and voltage.

Power Factor is the ratio of true power to apparent power.

**Watts to Amp calculation formula:**

**Typical Un-improved Power Factor by Industry:**

**Typical power factor of common household electronics:**

**Typical Motor Power Factors:**

Power | Speed | Power Factor | ||

(hp) | (rpm) | 1/2 load | 3/4 load | full load |

0 – 5 | 1800 | 0.72 | 0.82 | 0.84 |

5 – 20 | 1800 | 0.74 | 0.84 | 0.86 |

20 – 100 | 1800 | 0.79 | 0.86 | 0.89 |

100 – 300 | 1800 | 0.81 | 0.88 | 0.91 |

*Reference // Power Factor in Electrical Energy Management-A. Bhatia, B.E.-2012*

* Power Factor Requirements for Electronic Loads in California- Brian Fortenbery,2014*

* http://www.engineeringtoolbox.com*

**Watts to Amp conversion table:**

Watts | Phase | P.f | Volt | Amp |

1W | 3P | 0,8 | 208V | 0,003A |

2W | 3P | 0,8 | 208V | 0,006A |

3W | 3P | 0,8 | 208V | 0,01A |

4W | 3P | 0,8 | 208V | 0,013A |

5W | 3P | 0,8 | 208V | 0,017A |

6W | 3P | 0,8 | 208V | 0,02A |

7W | 3P | 0,8 | 208V | 0,024A |

8W | 3P | 0,8 | 208V | 0,027A |

9W | 3P | 0,8 | 208V | 0,031A |

10W | 3P | 0,8 | 208V | 0,034A |

20W | 3P | 0,85 | 220V | 0,061A |

30W | 3P | 0,85 | 220V | 0,092A |

40W | 3P | 0,85 | 220V | 0,123A |

50W | 3P | 0,85 | 220V | 0,15A |

60W | 3P | 0,85 | 220V | 0,18A |

70W | 3P | 0,85 | 220V | 0,2A |

80W | 3P | 0,85 | 220V | 0,24A |

90W | 3P | 0,85 | 220V | 0,27A |

100W | 3P | 0,85 | 220V | 0,3A |

200W | 3P | 0,9 | 440V | 0,291A |

300W | 3P | 0,9 | 440V | 0,43A |

400W | 3P | 0,9 | 440V | 0,58A |

500W | 3P | 0,9 | 440V | 0,72A |

600W | 3P | 0,9 | 440V | 0,87A |

700W | 3P | 0,9 | 440V | 1A |

800W | 3P | 0,9 | 440V | 1,16A |

900W | 3P | 0,9 | 440V | 1,32A |

1000W | 3P | 0,9 | 440V | 1,4A |

2000W | 3P | 0,95 | 480V | 2,53A |

3000W | 3P | 0,95 | 480V | 3,7A |

4000W | 3P | 0,95 | 480V | 5A |

5000W | 3P | 0,95 | 480V | 6,3A |

6000W | 3P | 0,95 | 480V | 7,5A |

7000W | 3P | 0,95 | 480V | 8,8A |

8000W | 3P | 0,95 | 480V | 10,1A |

9000W | 3P | 0,95 | 480V | 11,3A |

10000W | 3P | 0,95 | 480V | 12,6A |