Voltage Converter
Convert between volts, millivolts and kilovolts in one click.
The Voltage Converter is a free online tool that converts voltage values between volts (V), millivolts (mV), and kilovolts (kV) instantly. No sign-up needed — enter a value, choose your units, and get an accurate result. It's a useful reference for electronics hobbyists, students, and anyone comparing power supply or battery specifications.
What is a voltage converter?
Voltage is measured across a huge range — from millivolt signals in sensors and electronics, to standard household voltages, up to kilovolts in power transmission lines. This tool converts between these scales instantly, useful for electronics projects, electrical work, and coursework. Mixing up millivolts and volts is a common source of errors when reading sensor datasheets or wiring low-voltage circuits.
How to use the Voltage Converter
- Enter the voltage value you want to convert.
- Select the unit to convert from — volts, millivolts, or kilovolts.
- Click Calculate to see the equivalent across units.
Key features
- Supports volts, millivolts and kilovolts with precise scaling.
- Useful for electronics, circuit design, and electrical specs.
- Instant, accurate two-way conversion.
- Free and works directly in your browser.
Related tools
Also working with electrical values? Try the Current Converter, Power Converter, or the Charge Converter.
Frequently asked questions
Is the Voltage Converter free?
Yes, it's completely free with no sign-up required. Convert as many values as you need, with no account required.
How many millivolts are in a volt?
One volt equals 1,000 millivolts, and one kilovolt equals 1,000 volts. The same 1,000x scaling pattern applies again when converting kilovolts up to megavolts.
Where are kilovolts used?
Kilovolts are common in power transmission lines and high-voltage industrial equipment, where large amounts of electricity move over long distances. Handling kilovolt-level equipment requires specialized safety training due to the serious shock hazard involved.
Why do sensors use millivolts?
Many sensors output very small voltage signals, measured in millivolts, which are then amplified or processed by other circuitry. Amplifier and signal-conditioning circuits are often designed specifically to boost these small millivolt signals to usable levels.
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