Calculate Convert Volts, Watts & Amperes

Convert Volts, Watts & Amperes

With the Volt Watt Ampere Converter you can convert the electrical voltage, the amperage and the electrical power watt into the other two. The result is calculated using the formula for electrical power, and the calculation is explained in detail. You can find a lot of additional information and calculators on our guide pages Calculate Volts, Calculate Amperes and Calculate Watts.

The most important topics on the Volt/Watt/Ampere Converter

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General information on voltage, amperage and wattage

Voltage (volts), current (amperes) and power (watts) are important concepts in electrical engineering. Voltage refers to the force that drives electrons in a circuit. One can therefore also speak of the force of the individual electrons. If you imagine a water hose, the voltage is comparable to the water pressure that drives the water through the hose. If you imagine a river, you can also compare the voltage with the gradient of the river.

Current (amperage) is the amount of electrons that flow through a circuit per second. This can be thought of as the amount of water flowing through the hose or river. The unit for amperage is the ampere.

Power (wattage) refers to the work done in a system. Taking the water example again, power is the amount of water that flows through the hose in a given time. In electrical engineering, power is measured in watts.

When voltage and amperage are increased, power also increases. This is similar to a water hose, in which higher voltage and amperage cause more water to flow through the hose.

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Input aids for the Volt/Watt/Amp Converter

In the following, you will find information on the individual input fields of the Volt/Watt/Amp Converter.

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What should be calculated?

Volt Watt Ampere Converter: What should be calculated? Please select which of the following three values should be calculated.


  • Voltage in volts: If you want to calculate the voltage in volts, you can enter the current in amperes and the power in watts.
  • Current in amperes: You can calculate the current if you know the voltage in volts and the power in watts.
  • Power in watts: And you can also calculate the power in watts if you know the electrical voltage and the amperage.
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Voltage (Volt)

Volt Watt Ampere Converter: Voltage (Volt) Please enter the electrical voltage in volts. If you have an indication in millivolts (mV), you must first multiply this value by 1000 to convert it into volts. The voltage is indicated in volts in the international system of units and has the unit symbol "V". The electrical voltage has the formula symbol "U" (from Latin urgere: to urge, to press).

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Amperage (Ampere)

Volt Watt Ampere Converter: Amperage (Ampere) Please enter the amperage in amperes. If you have an entry in milliamps (mA), you must first multiply this value by 1000 to convert it to amperes. The current strength is indicated in the international system of units in amperes and has the unit symbol "A". The current intensity has the formula symbol "I" (from the French intensité du courant).

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Power (Watt)

Volt Watt Ampere Converter: Power (Watt) Please enter the electrical power in watts. If you have an indication in milliwatts (mW), you must first multiply this value by 1000 to convert it into watts. If you have a value in kilowatts (kW), you must first divide this value by 1000 to convert it into watts. In the international system of units, electrical power is given in watts and has the unit symbol "W". The electrical power has the formula symbol "P" (from English power).

What other readers have also read


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Special information on calculating volts, watts and amps

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Last update

This page of the 'Convert Volts, Watts & Amps' category was last edited or reviewed by Stefan Banse on March 22, 2023. It corresponds to the current status.

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