Voltage Converter
Convert
Enter a value and pick the source and target units; the result updates live.
Voltage is the electrical potential difference between two points — the "pressure" that drives charge through a circuit. It's measured in volts (V). A battery provides a fixed voltage; a power supply maintains it under load; a signal swings between voltages.
Converting between V, mV, µV, kV and MV is essential when reading multimeters (which often display mV), spec sheets (which may list kV insulation ratings), or designing circuits where a small mV signal must be compared against a 12 V rail. This converter handles the metric prefixes so you don't misplace a decimal.
Common applications
Reading a multimeter in mV and converting to V; checking a battery's voltage against its rating; comparing a sensor's mV output to an op-amp's supply; verifying insulation ratings in kV.
Frequently asked questions
Voltage is the electrical potential difference between two points. It's the force that pushes charge through a circuit, measured in volts (V).
1 V = 1000 mV. Multiply by 1000 (or select V → mV in the converter).
The volt (V). All other units are multiples or sub-multiples via metric prefixes.
Exact — metric prefixes are powers of 10, so there's no rounding error.