Voltage Converter

Whether you're traveling abroad, setting up electronics, or working on an electrical project, our voltage conversion calculator helps you convert voltage levels quickly and accurately. From switching between 110V and 220V to scaling up for industrial machinery, this tool ensures your devices operate safely and efficiently.

Voltage is just the beginning. The full Conversion Tool library covers everything from units of speed to volume, so you're never stuck Googling conversions again.

What Is Voltage?

Voltage, also known as electric potential difference, is the force that drives electric current through a circuit. It represents the difference in electric potential between two points and determines how much energy is available to move electric charges. In simple terms, voltage is like water pressure in a pipe—it pushes electrons through a conductor, allowing electrical devices to operate.

The SI unit of voltage is the volt (V), named after Alessandro Volta, the scientist who invented the first chemical battery. One volt is defined as the potential difference required to move one joule of energy per coulomb of charge.

Voltage conversion is widely used in various applications, ensuring that electrical devices operate efficiently and safely. Some common uses include:

• Home Appliances: Travel adapters often convert voltage—like stepping down from 220V to 110V—so your electronics work with foreign power outlets.

• Electric Power Transmission: Electricity leaves power plants at extremely high voltages (sometimes over 110,000 volts) and is stepped down before reaching homes and businesses.

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  Battery-Powered Gadgets: Laptops, smartphones, and electric vehicles rely on regulated voltage that matches their battery requirements.

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  Industrial Machinery: Factories use voltage converters to match machines with varying regional power systems.

   

Once voltage is sorted, current is usually next in line. A quick look at the Current Converter keeps everything in check.

Ohm’s Law

Voltage works closely with two other electrical variables: current and resistance. Ohm’s Law shows how they’re connected:

V=I×R 

Where:

• V is voltage in volts (V),

• I is current in amperes (A),

• R is resistance in ohms (Ω).

Electricians, engineers, and students use this equation to plan circuits, choose correct resistors, and calculate safe voltage drops. If you want a fast way to work through these calculations, try our Ohm’s Law Calculator — just input two known values to get the third instantly.

Voltage Units and Conversion

Voltage can be expressed in various units depending on the application, ranging from extremely small values in microelectronics to enormous voltages in high-energy physics. The volt (V) is the standard SI unit, but other units like millivolts (mV), kilovolts (kV), abvolts (abV), and statvolts (statV) are also used in different scientific and engineering contexts. 

Quick Conversion Formulas:

• Millivolts to Volts: V = mV ÷ 1,000

• Kilovolts to Volts: V = kV × 1,000

• Microvolts to Volts: V = μV ÷ 1,000,000

In multi-metric projects where you’re also managing fuel tanks, battery fluids, or physical containers, the Volume Converter can help you calculate precise liquid or gas volumes alongside your electrical planning.

Voltage units conversion table:

Sometimes you’ve got the watts but need the volts. The Watt to Volt Converter bridges that gap instantly. Or working backward from voltage to current? The volt to amp calculator makes it a quick two-step process.