Voltage Converter
Fast, accurate voltage conversions, right in your browser.
The Voltage Converter converts voltage between common units — volts, millivolts, kilovolts — instantly and accurately. Enter a value in one unit and see it converted to all supported units at once.
Whether you're working on an engineering calculation, a recipe, a science assignment or converting specs from an international source, this tool eliminates manual conversion-factor lookups and rounding errors.
How to Convert voltage
- Enter your value and select the starting unit
- Choose the unit you want to convert to
- The converted result appears instantly
Best Practices
- Double-check which unit variant is expected (e.g. US vs. metric) for your specific use case
- For engineering or scientific work, verify precision requirements against the tool's decimal output
- Bookmark this tool for quick repeated conversions
This tool is free to use with no signup required.
Frequently Asked Questions
What voltage units does this converter support?
Common units include volts (V), millivolts (mV), microvolts, and kilovolts (kV).
How many millivolts are in a volt?
1,000 millivolts (mV) equal one volt (V).
Why do different countries use different standard voltages?
Historical infrastructure decisions led to different regional standards — for example, most of North America uses 120V household power, while much of Europe and Asia uses 220-240V.
Is this useful for electronics hobbyist projects?
Yes — converting between volts and millivolts is common when reading sensor outputs, battery specifications, or component datasheets in electronics work.
Is this tool free to use?
Yes, completely free with no signup, no limits and no software to install.
Is my data saved anywhere?
No — conversions run in your browser and the values you enter are not stored or sent to a server.
What voltage does a standard AA battery provide?
A standard alkaline AA battery provides 1.5 volts.
Is this useful for solar panel or power system specs?
Yes — solar panels, batteries, and inverters are commonly rated in volts, and unit conversion helps when comparing specs from different manufacturers or regions.
What is kilovolt used for?
Kilovolts (kV) are used for high-voltage applications like power transmission lines, which typically operate at tens or hundreds of kV.
Is voltage the same as power?
No — voltage (volts) measures electrical potential, while power (watts) measures the rate of energy transfer, calculated as voltage multiplied by current.
