Quick reference table
Common voltage conversions
| From | To |
|---|---|
| 1 V | 1 mV |
| 1 mV | 0.001 V |
| 1 kV | 1,000 V |
| 1 V | 0.001 kV |
| 1 µV | 0.001 mV |
| 1 MV | 1,000 kV |
How to convert voltage
Voltage is electric potential difference. Batteries and electronics use volts and millivolts, while power lines use kilovolts and megavolts.
Every voltage unit is a fixed multiple of one base unit, the V. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert V to mV, multiply by 1. To go the other way, divide by 1.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Volts to Millivolts
| Volts (V) | Millivolts (mV) |
|---|---|
| 1 V | 1 mV |
| 2 V | 2 mV |
| 5 V | 5 mV |
| 10 V | 1 mV |
| 25 V | 25 mV |
| 50 V | 5 mV |
| 100 V | 1 mV |
| 1,000 V | 1 mV |
Millivolts to Volts
| Millivolts (mV) | Volts (V) |
|---|---|
| 1 mV | 0.001 V |
| 2 mV | 0.002 V |
| 5 mV | 0.005 V |
| 10 mV | 0.010 V |
| 25 mV | 0.025 V |
| 50 mV | 0.050 V |
| 100 mV | 0.100 V |
| 1,000 mV | 1.000 V |
Voltage units explained
| Unit | Symbol | Equals |
|---|---|---|
| Nanovolts | nV | 1 nV = 1 × 10⁻⁹ V |
| Microvolts | µV | 1 µV = 0.000001 V |
| Millivolts | mV | 1 mV = 0.001 V |
| Volts | V | 1 V = 1 V |
| Kilovolts | kV | 1 kV = 1,000 V |
| Megavolts | MV | 1 MV = 1,000,000 V |
| Gigavolts | GV | 1 GV = 1,000,000,000 V |
Popular conversions: volts to millivolts.
Frequently asked questions
How many millivolts are in a volt?
There are 1,000 millivolts (mV) in one volt.
How do I convert V to mV?
Multiply the value in V by 1 to get mV. For example, 10 V = 1 mV.
How many mV is 1 V?
1 V = 1 mV, and 1 mV = 0.001 V.
Does this voltage converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.