Voltage Converter
Convert between pV, nV, µV, mV, V, kV, MV. Free, with no limits and no account needed.
About Voltage Units
Voltage (electric potential difference) is measured in volts (V) and drives current through a circuit.
Real-world voltages span an enormous range — from the microvolts at the output of a thermocouple, through the millivolts of a sensor signal, to the kilovolts on a transmission line. SI prefixes let you write each of these without a string of zeros, and getting the prefix wrong is a factor-of-1000 error.
Example conversions
- 3.3 V = 3300 mV — a typical microcontroller supply rail.
- 0.05 V = 50 mV — a small shunt-resistor measurement.
Frequently asked questions
How do I convert volts to millivolts?
Multiply by 1000. 1 V equals 1000 mV, so 3.3 V is 3300 mV.
How do I convert microvolts to volts?
Divide by 1,000,000. 250 µV is 0.00025 V.
How do I convert millivolts to volts?
Divide by 1000. 850 mV is 0.85 V.
Related converters
Voltage is closely related to these quantities in everyday electronics work.