This page converts kilovolts into millivolts using the factor 1,000,000, and shows the reverse figure alongside it. Both units measure the electrical potential difference driving a current, which is why one number does the whole job.
Millivolts are the working scale of sensors and thermocouples, where the whole usable signal may span less than a volt. Kilovolts describe distribution lines, ignition systems and insulation ratings — the level at which air itself starts to conduct.
Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into millivolts, which is usually more useful than the bare number.
The formula
kilovolts- The amount you are converting, in kilovolts
1,000,000- The exact number of millivolts in one kilovolt
millivolts- The converted result
How it works, step by step
- Enter the value in kilovolts.
- It is multiplied by 1,000,000, the exact factor between the two units.
- The answer is shown in millivolts, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
USB bus: 0.005 kV in millivolts
USB bus comes to about 0.005 kV. Multiplying by the factor: 0.005 × 1e+06 = 5000 mV. Dividing the answer back by 1e+06 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
Car battery: 0.0126 kV in millivolts
Car battery comes to about 0.0126 kV. Multiplying by the factor: 0.0126 × 1e+06 = 12,600 mV. Dividing the answer back by 1e+06 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many millivolts are in one kilovolt?
Exactly 1,000,000. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert kilovolts to millivolts?
millivolts = kilovolts × 1,000,000. Reversed, kilovolts = millivolts ÷ 1,000,000, which is the same as multiplying by 1e-06.
Which is the bigger unit, the kilovolt or the millivolt?
The kilovolt. One kilovolt equals 1e+06 millivolts.
What does this quantity actually measure?
Both units measure the electrical potential difference driving a current. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a kilovolt?
Kilovolts describe distribution lines, ignition systems and insulation ratings — the level at which air itself starts to conduct.
What is a millivolt?
Millivolts are the working scale of sensors and thermocouples, where the whole usable signal may span less than a volt.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Kilovolts to millivolts reference tables
| Kilovolts | Millivolts |
|---|---|
| 0.5 kV | 500,000 mV |
| 1 kV | 1e+06 mV |
| 2 kV | 2e+06 mV |
| 3 kV | 3e+06 mV |
| 5 kV | 5e+06 mV |
| 10 kV | 1e+07 mV |
| 20 kV | 2e+07 mV |
| 25 kV | 2.5e+07 mV |
| 50 kV | 5e+07 mV |
| 75 kV | 7.5e+07 mV |
| 100 kV | 1e+08 mV |
| 250 kV | 2.5e+08 mV |
| 500 kV | 5e+08 mV |
| 1000 kV | 1e+09 mV |
| 5000 kV | 5e+09 mV |
Exact factor: 1 kilovolt = 1,000,000 millivolts.
| Quantity | kV | mV |
|---|---|---|
| AA alkaline cell | 0.0015 kV | 1500 mV |
| USB bus | 0.005 kV | 5000 mV |
| Car battery | 0.0126 kV | 1.26e+04 mV |
| UK mains | 0.23 kV | 2.3e+05 mV |
| US mains | 0.12 kV | 1.2e+05 mV |
| Overhead distribution line | 11 kV | 1.1e+07 mV |
Published reference values, converted with the same factor this page uses.