Online Tool Store
Voltage Converter
Convert volts, millivolts, microvolts, kilovolts, and megavolts instantly for free. Calculations run privately in your browser.
This works right here on your device — nothing gets sent out.
Results update as you type. Negative voltage values are supported.
How to convert voltage units
- Enter a positive or negative voltage measurement.
- Select its current unit, from microvolts through megavolts.
- Read and copy each equivalent, or select a result value to continue from that unit.
The conversion method
Each input is first converted to volts using its SI prefix factor, then divided by the target unit’s factor. Micro means 10−6, milli means 10−3, kilo means 103, and mega means 106. Therefore, target value = input value × source factor ÷ target factor.
Example: the prefilled 1 volt equals 1,000,000 microvolts, 1,000 millivolts, 0.001 kilovolts, and 0.000001 megavolts.
FAQ
How many millivolts are in one volt?
One volt equals 1,000 millivolts. A millivolt is one-thousandth of a volt, so multiply volts by 1,000.
How many volts are in one kilovolt?
One kilovolt equals 1,000 volts. Multiply kilovolts by 1,000 to convert the measurement to volts.
What is a microvolt?
A microvolt is one-millionth of a volt. One volt equals 1,000,000 microvolts, and 1,000 microvolts equal one millivolt.
Does this calculate electrical power or current?
No. It converts electric potential units only. Calculating power, current, or resistance requires additional values and formulas such as Ohm’s law.
Can voltage be negative?
Yes. Voltage can be positive or negative depending on the reference point, and this converter preserves its sign.
Can I copy or reuse a converted value?
Yes. Copy a result directly, or select the result value to continue converting from that unit.
Are the measurements uploaded or stored?
No. Every conversion is calculated locally in your browser, and the values you enter are not uploaded to Online Tool Store.
How we compare
| Feature | Online Tool Store | RapidTables | UnitConvertersOnline |
|---|---|---|---|
| Results shown simultaneously | All five units | Separate pair-specific pages | Selected source and target |
| Supported range | Microvolts to megavolts | Microvolts through gigavolts listed | Volts, millivolts, and kilovolts highlighted |
| Runs locally without an account | Yes | Browser-based | Browser-based |
Choose RapidTables when you need additional scales such as gigavolts, or UnitConvertersOnline for a traditional from/to workflow. Choose Online Tool Store Voltage Converter when you want all common voltage equivalents displayed together immediately and privately.