How it works
Convert electric potential difference between volts and metric prefixes. Prefix case matters: mV is millivolts while MV is megavolts.
result = value × source factor / destination factor
Worked example
Show example inputs and result
Value: 100 · From unit: V · To unit: mV.
- Converted value
- 100,000 mV
Questions and answers
Which unit convention is used?
Convert electric potential difference between volts and metric prefixes. Prefix case matters: mV is millivolts while MV is megavolts.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Conversion reference: NIST SI Guide
Method reviewed: October 8, 2026 · Methods & accuracy