If we know the amperage (A), we can easily convert watts to volts. For the W to V conversion, we can use the formula for electric power:

**P (W) = I (A) * V (V)**

To calculate volts from watts, we need to rearrange this formula by expressing voltage like this:

**Volt = Watts / Amps**

To convert watts to volts, we need to know how many amps does the electrical circuit has.

**Example 1:** *1 volt is equal to how many watts?* If you have a 1 amp circuit, 1 volt is equal to 1 watt. If you have a 100 amp circuit, 1 volt is equal to 100 watts.

**Example 2:** *How many watts in a volt?* Amps are the key here as well; in a 1 amp circuit, you have 1 watt per volt. If you have a 10 amp circuit, you will have 10 watts in a volt.

You can freely use this handy watts to volts calculator by inserting W and A. Further on, you’ll find a conversion chart with calculated volts from watts at certain amps:

## Watts To Volts Calculator

### Watts To Volts Conversion Chart

It’s useful to know how many volts are in a watt.

In short, 1 watt is equal to 1 amp (at 1V). Based on this, we can calculate this conversion table:

Watts (W) | Amps (A) | Volts (V) |
---|---|---|

How many volts in 1 watt? | 1 amp | 1 volts |

How many volts in 2 watts? | 1 amp | 2 volts |

How many volts in 10 watts? | 1 amp | 10 volts |

How many volts in 20 watts? | 1 amp | 20 volts |

How many volts in 50 watts? | 1 amp | 50 volts |

How many volts in 100 watts? | 1 amp | 100 volts |

How many volts in 200 watts? | 1 amp | 200 volts |

How many volts in 500 watts? | 1 amp | 500 volts |

How many volts in 1000 watts? | 1 amp | 1000 volts |

How many volts in 2000 watts? | 1 amp | 2000 volts |

How many volts in 3000 watts? | 1 amp | 3000 volts |

How many volts in 4000 watts? | 1 amp | 4000 volts |

How many volts in 5000 watts? | 1 amp | 5000 volts |

If you have any specific watts to volts conversion in mind, you can use the comments below and we’ll try to help you out. Please do include the amperage (A).

I want to combine 2 solar panels. One is 390 watts,the other is 275. My charge controller is good for 150 volts. Will this work.

Hello Howard, the combined wattage is 665W and you have a 150V charge controller. That controller needs to handle 665W/150V = 4.5 amps. If it can, then it’s good; if not, you can’t really do this.

I have two solar panels each 250 watts

Hybrid inverter 1kva

I have to bettary 150Ah

Will this work

Hi Patrick, it will work. The combined 500W solar panels will probably produce 2.5 kWh per day (given 5 peak sun hours). 150Ah 12V battery has a 1.8 kWh capacity. It sounds like a nice little solar system.

you can not mix wattage to a mppt. 100 watt panels with 100 watt panels. 250 with 250. 300 with 300. if you plan on doing it like that you will destroy your mppt. The only way you may mix panels is if you get a second mppt and hook up your odd end to that. let me explain. say i have 3 solar panels 2 are 100 watts and the third is 250 watts you may hook up both of the 100 watt panels to one charge controller and the 250 watt needs to go to a second charge controller

I want to combine 2 solar panel. one is 250 watts the other one is180 watts my charge controller is 24 volts, so how many ampere of battery will I need?

Hello there, you can tally up the wattages and calculate amps from there (since you know the voltage). You’re dealing with 250W + 180W = 430 watts and you have a 24-volt circuit. Here’s how you can calculate amps: 430W / 24V = 18 amps. You will need at least 18 amp battery, 20 amp would be the safe option.

Tnx bro

I have a 220 volts electric system in my country.can a hair dryer of 12Vac,60Hz,950 W

Work on this electricity?

Hello, you usually have a 220V circuit with a 12A, 16A, or 20A breaker. These circuits can easily handle more than 2,000W; a 950W hair dryer will work on this electricity without problems.

I want to buy a charger for my trolley speaker. The watt is 500 and DC voltage is 15.What is the amps

Alright, 500W and 15V. Here’s how you calculate the amps: 500W / 15V = 33.3A.

I would like to buy a portable welding machine. Need help what size of generator and portablr welding machine to buy

Hi Barbara, the best article for this would be this generator sizing article. In short, you need to know the start-up wattage and running wattage of your portable welding machine. Portable welding machines usually require quite a lot of power; 200 amps 110V machine will run on 22,000W. The peak wattage (start-up wattage) will be about 25,000W-30,000W. So, you would need a generator that can provide 30,000 watts of power; 30kW generator. Hope this helps.

18A

240VAC

60 hz

4320W

is this a 110 or 220

Hi Diane, the simple calculation would be 4320W / 18A = 240V (exactly). So you have 240V voltage. Hope this helps.