How to use the voltage converter
- Type the voltage in Value.
- Set From to the unit it is written in, such as kilovolts.
- Set To to the unit you need. The result appears immediately.
- Use the swap button to reverse it, and the table to compare all seven units.
What it does and when to use it
Voltage is written with whatever prefix keeps the number readable. Grid equipment uses kilovolts, batteries and logic circuits use volts, thermocouples and strain gauges produce millivolts, and medical or audio front ends work in microvolts. Particle accelerators and lightning use megavolts. This converter moves a value between those prefixes and also handles the two CGS units, the abvolt and statvolt, that appear in older physics texts.
It is a units tool only. It does not tell you whether a device will work on another country’s mains supply; check the rating plate for a range such as 100–240 V instead.
Pair it with the current converter and the resistance converter when a datasheet mixes prefixes, then solve the circuit with the Ohm’s law calculator.
How it works
The volt is the base. Each unit has a factor in volts:
| Unit | Volts |
|---|---|
| megavolt | 1,000,000 |
| kilovolt | 1,000 |
| millivolt | 0.001 |
| microvolt | 0.000001 |
| abvolt | 0.00000001 |
| statvolt | 299.792458 |
The tool multiplies your value by the “from” factor, then divides by the “to” factor. The statvolt factor is c × 10⁻⁶, where c = 299,792,458 m/s is exact, so no rounded constant is involved.
Worked examples
Distribution line. 11 kV = 11,000 volts. Many local networks distribute power at around this level before transformers reduce it for homes.
A small sensor signal. 850 µV = 0.85 millivolts, or 0.00085 V. Data loggers often want the input in mV, so this is the figure you would type into their scaling settings.
CGS physics. 1 statvolt = 299.792458 volts. Going the other way, 1 V is 0.003335640952 statvolts.
Limits and tips
- RMS, peak and peak-to-peak are not converted into each other. A 230 V RMS supply has a peak of about 325 V; that is a waveform calculation, not a unit change.
- Decibel levels such as dBV and dBu are logarithmic and are not covered here.
- The megavolt row of the table shows scientific notation for very small inputs, for example 850 µV is 8.5e-10 MV.
Frequently asked questions
Can this change 230 V mains to 110 V for my appliance?
How many volts are in a kilovolt?
How many millivolts are in a volt?
What is a statvolt?
What is an abvolt?
Sources
- NIST Guide to the SI, Appendix B.8: Factors for units listed alphabetically — NIST, accessed 2026-10-08
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