This page converts megavolts into millivolts using the factor 1,000,000,000, 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. One mega volt is a million of a volt (1e6 volts).
Below the calculator there is a step table for the values people look up most, and a second table putting real the electrical potential difference driving a current figures into millivolts so the number you get has something to be compared against.
The formula
megavolts- The amount you are converting, in megavolts
1,000,000,000- The exact number of millivolts in one megavolt
millivolts- The converted result
How it works, step by step
- Enter the value in megavolts.
- It is multiplied by 1,000,000,000, 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
Overhead distribution line: 0.011 MV in millivolts
At 0.011 MV (overhead distribution line), the same quantity in millivolts is 0.011 × 1e+09 = 1.1e+07 mV. One megavolt is 1e+09 millivolts, so the numbers grow as expected.
US mains: 0.00012 MV in millivolts
Take us mains, roughly 0.00012 MV. The conversion is a single multiplication — 0.00012 × 1e+09 — giving 120,000 mV. Because the relationship is proportional, doubling the input doubles the answer to 240,000 mV.
How to read your score
Frequently asked questions
How many millivolts are in one megavolt?
Exactly 1,000,000,000. 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 megavolts to millivolts?
millivolts = megavolts × 1,000,000,000. Reversed, megavolts = millivolts ÷ 1,000,000,000, which is the same as multiplying by 1e-09.
Which is the bigger unit, the megavolt or the millivolt?
The megavolt. One megavolt equals 1e+09 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 megavolt?
One mega volt is a million of a volt (1e6 volts).
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.
Megavolts to millivolts reference tables
| Megavolts | Millivolts |
|---|---|
| 0.5 MV | 5e+08 mV |
| 1 MV | 1e+09 mV |
| 2 MV | 2e+09 mV |
| 3 MV | 3e+09 mV |
| 5 MV | 5e+09 mV |
| 10 MV | 1e+10 mV |
| 20 MV | 2e+10 mV |
| 25 MV | 2.5e+10 mV |
| 50 MV | 5e+10 mV |
| 75 MV | 7.5e+10 mV |
| 100 MV | 1e+11 mV |
| 250 MV | 2.5e+11 mV |
| 500 MV | 5e+11 mV |
| 1000 MV | 1e+12 mV |
| 5000 MV | 5e+12 mV |
Exact factor: 1 megavolt = 1,000,000,000 millivolts.
| Quantity | MV | mV |
|---|---|---|
| AA alkaline cell | 1.5e-06 MV | 1500 mV |
| USB bus | 5e-06 MV | 5000 mV |
| Car battery | 1.26e-05 MV | 1.26e+04 mV |
| UK mains | 0.00023 MV | 2.3e+05 mV |
| US mains | 0.00012 MV | 1.2e+05 mV |
| Overhead distribution line | 0.011 MV | 1.1e+07 mV |
Published reference values, converted with the same factor this page uses.