Voltage Converter
Convert between voltage units instantly: volts, millivolts, kilovolts, megavolts, and microvolts. Free, accurate, and 100% in your browser.
Reference
How does voltage conversion work?
Voltage conversion uses fixed SI prefix ratios with the volt (V) as the base unit. 1 kV = 1,000 V, 1 MV = 1,000,000 V, 1 mV = 0.001 V, and 1 µV = 0.000001 V. The volt is the SI unit of electric potential difference, defined as one joule per coulomb. All conversions are exact because they use standard SI metric prefixes.
Unit reference
Microvolt (µV) — one millionth of a volt. Used in biomedical signals like EEG and ECG measurements. Millivolt (mV) — one thousandth of a volt. Common in sensor outputs, thermocouples, and low-voltage electronics. Volt (V) — the SI base unit of electric potential. Standard for household batteries (1.5V, 9V) and USB (5V). Kilovolt (kV) — one thousand volts. Used in power distribution, X-ray equipment, and electric fences. Megavolt (MV) — one million volts. Found in high-energy physics, lightning, and power transmission lines.
Common use cases
Electronics — convert between mV sensor readings and V circuit specifications. Power engineering — convert transmission line voltages between kV and V. Biomedical — convert µV brain signals or mV cardiac signals to standard units. Education — learn SI prefix relationships for electrical units. Lab work — quickly convert between measurement scales on different instruments.
Privacy
All calculations run 100% in your browser. No data is sent to any server.