Which is equal to one kilovolt?

The metric prefix 'kilo' always stands for one thousand (1,000) of whatever base unit it precedes. Therefore, one kilovolt (kV) is equal to exactly one thousand volts. It is important to keep your prefixes straight to avoid calculation mistakes in radio electronics. For example, 'milli' means one one-thousandth (0.001), and 'mega' means one million (1,000,000). So, one one-thousandth of a volt is a millivolt, and one million volts is a megavolt.