Voltage Converter

Convert between volts, millivolts, kilovolts and megavolts instantly.

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Voltage Converter – Step Up, Step Down & Universal Adapters
Use our free Voltage Conversion Calculator to convert between 110V, 220V and other international voltage standards. Whether you’re traveling, using appliances from another country, or working with electrical equipment, this tool provides instant and accurate voltage conversions.

A voltage converter (or transformer) is a device that allows electrical equipment to operate in regions with different voltage standards. For example:

  • United States: 110–120V AC
  • Europe & Asia: 220–240V AC

If your device is designed for 110V but you’re in Europe with 220V outlets, you’ll need a step-down converter. Similarly, if you’re in the US but your device requires 220V, you’ll need a step-up converter.

Our online voltage calculator is simple to use:

  • Step 1: Enter the voltage value in the input field.
  • Step 2: Select the unit or type of conversion you want (e.g., 110V to 220V, or volts to millivolts/kilovolts).
  • Step 3: Choose the output unit.
  • Step 4: Click “Convert” to see the exact result instantly.

This helps you find the right power supply setup for your devices and ensures compatibility while traveling.

  • Step-Down Converter: Converts 220V → 110V for US devices abroad.
  • Step-Up Converter: Converts 110V → 220V for European/Asian devices in the US.
  • Universal Travel Converter: Works worldwide, often includes plug adapters for multiple countries.
  • Voltage Calculator: Converts between volts, millivolts, kilovolts and electrical charge units (Coulomb, Faraday, Ampere-hour).

Manually checking voltage compatibility can be risky and lead to damaged electronics. An online voltage converter ensures:

  • Safe travel – know which voltage and adapter you need for any country.
  • Device protection – prevents overvoltage or undervoltage damage.
  • Time savings – no manual calculations required.
  • Cost efficiency – avoid buying duplicate devices abroad.

Especially for sensitive devices like laptops, medical equipment and chargers, a reliable converter is essential.

  • Supports step-up and step-down conversions.
  • Converts volts to kilovolts, millivolts and electrical charge units.
  • Works for international travel (110V ↔ 220V).
  • Completely free — no installation or signup required.
  • Mobile-friendly, accurate and fast.

Yes, but it depends on the converter you use. Always choose a high-quality voltage transformer with surge protection. Avoid cheap converters, as they may fail during power fluctuations and damage sensitive electronics.

Our online voltage calculator helps you choose the right transformer size and capacity before plugging in your devices.