Enter a voltage in any field. It is scaled to volts using the metric factor, then divided out to populate every other unit.
1 V equals 1000 mV; the milli prefix represents one-thousandth of a volt.
The volt (V) is the base; kilovolts and megavolts scale up by 1,000 and 1,000,000.
1 MV is 1,000,000 V, a scale seen in high-voltage transmission and lab equipment.