One millivolt is exactly 1e-09 megavolts, so converting millivolts to megavolts is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
One mega volt is a million of a volt (1e6 volts). Millivolts are the working scale of sensors and thermocouples, where the whole usable signal may span less than a volt.
The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in megavolts, so you can sanity-check whether your answer is a plausible size.
The formula
millivolts- The amount you are converting, in millivolts
1e-09- The exact number of megavolts in one millivolt
megavolts- The converted result
How it works, step by step
- Enter the value in millivolts.
- It is multiplied by 1e-09, the exact factor between the two units.
- The answer is shown in megavolts, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
UK mains: 2.3e+05 mV in megavolts
UK mains comes to about 2.3e+05 mV. Multiplying by the factor: 2.3e+05 × 1e-09 = 0.00023 MV. Dividing the answer back by 1e-09 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
USB bus: 5000 mV in megavolts
At 5000 mV (usb bus), the same quantity in megavolts is 5000 × 1e-09 = 5e-06 MV. One millivolt is 1e-09 megavolts, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many megavolts are in one millivolt?
Exactly 1e-09. 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 millivolts to megavolts?
megavolts = millivolts × 1e-09. Reversed, millivolts = megavolts ÷ 1e-09, which is the same as multiplying by 1,000,000,000.
Which is the bigger unit, the millivolt or the megavolt?
The megavolt. One millivolt is only 1e-09 of a megavolt, so it takes 1e+09 millivolts to make one megavolt.
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 millivolt?
Millivolts are the working scale of sensors and thermocouples, where the whole usable signal may span less than a volt.
What is a megavolt?
One mega volt is a million of a volt (1e6 volts).
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.
Millivolts to megavolts reference tables
| Millivolts | Megavolts |
|---|---|
| 0.5 mV | 5.00000e-10 MV |
| 1 mV | 1e-09 MV |
| 2 mV | 2e-09 MV |
| 3 mV | 3e-09 MV |
| 5 mV | 5e-09 MV |
| 10 mV | 1e-08 MV |
| 20 mV | 2e-08 MV |
| 25 mV | 2.5e-08 MV |
| 50 mV | 5e-08 MV |
| 75 mV | 7.5e-08 MV |
| 100 mV | 1e-07 MV |
| 250 mV | 2.5e-07 MV |
| 500 mV | 5e-07 MV |
| 1000 mV | 1e-06 MV |
| 5000 mV | 5e-06 MV |
Exact factor: 1 millivolt = 1e-09 megavolts.
| Quantity | mV | MV |
|---|---|---|
| AA alkaline cell | 1500 mV | 1.5e-06 MV |
| USB bus | 5000 mV | 5e-06 MV |
| Car battery | 1.26e+04 mV | 1.26e-05 MV |
| UK mains | 2.3e+05 mV | 0.00023 MV |
| US mains | 1.2e+05 mV | 0.00012 MV |
| Overhead distribution line | 1.1e+07 mV | 0.011 MV |
Published reference values, converted with the same factor this page uses.