Using the Volt Calculator, you can calculate the voltage in volts by entering the current in amperes and the power in watts. The Volt Calculator then automatically determines the corresponding volt number. Calculating volts is useful for anyone working with electrical circuits.

Would you like to calculate the current in amperes or power in watts instead of calculating the volts, i.e., the voltage? If so, you can use our guide pages with the Ampere Calculator or the Watt Calculator.

Volt is a unit of electrical voltage and is often used in electrical engineering and electronics to measure or calculate the electrical voltage or potential difference between two points. It is important to know the voltage in a circuit to ensure that electrical equipment or components work properly and are not damaged. Voltage can also be used to calculate the power and efficiency of electrical equipment and circuits.

In electronics, voltage is an important quantity for analysing the functioning of circuits. The use of voltmeters is therefore essential when troubleshooting electronic circuits. In addition, voltage values can be used to determine which components are needed to build a particular circuit.

In summary, the calculation of volts is important to measure and monitor the electrical voltage in a circuit to ensure the proper operation of electrical equipment and circuits.

Volt is the unit for electrical voltage. Electrical voltage is the force that moves electrons and creates a current flow. It is measured in volts and is a fundamental quantity in electrical engineering. One volt is the voltage required to drive a current of one ampere through a resistance of one ohm.
The term "volt" was named after the Italian physicist Alessandro Volta, who is known for his work in the field of electricity. He invented the first battery in 1800 and thus developed the first continuous source of electricity.

The voltage in volts is obtained by dividing the electrical power in watts by the current in amperes. The formula is therefore:

Formula for Volt

Volt (V) = Power (W) / Amperage (A)

This formula for calculating voltage indicates the voltage required by an electrical appliance or system when the power and amperage are known. By dividing the power by the amperage, the voltage (in volts) required by the appliance or system is obtained.

In the Volt Calculator, the voltage in volts is already preset under "What should be calculated?” According to the formula Volt (V) = Power (W) / Amperage (W), the Volt Calculator still needs the two remaining entries for the power in watts and the amperage in amperes to calculate the voltage in volts. These two required inputs are described below:

Power in Watt

Please enter the electrical power in watts. If you have an indication in milliwatts (mW), you must first multiply this value by 1,000 to convert it into watts. If you have a value in kilowatts (kW), you must first divide this value by 1,000 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).

Amperage in Ampere

Please enter the amperage in amperes.
If you have a value in milliamperes (mA), you must first multiply this value by 1000 to convert it into amperes.
The current strength has the formula symbol "I" (from the French intensité du courant).
In the international system of units, the amperage is given in the unit ampere and has the unit symbol "A".

The battery of an e-bike requires a certain voltage, which is calculated from its values for amperage in amperes and power in watts. If the battery of the e-bike has a current of 15 amperes and a power of 480 watts, the Volt Calculator will calculate the voltage as follows:

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.

Changes in this category "Convert Volts, Watts & Amps"