Millivolt is 0.001 volt units.
Millivolts to Volts Converter — mV to V
Convert Millivolt (mV) to Volt (V) using the exact conversion factor (1 millivolt = 0.001 volt). See the formula, worked examples, conversion table, history, and common uses.
Millivolts to Volts converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Volt is the SI unit of electric potential.
Result = input x 0.001 / 1.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Millivolts to Volts
Millivolt and Volt both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Millivolt is 0.001 volt units, and volt is the SI unit of electric potential.
Formula
volts = millivolts × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 millivolt equals 0.001 base units, and 1 volt equals 1 base unit, so dividing one by the other gives the direct millivolt-to-volt factor of 0.001.
Simple example
1 mV × 0.001 = 0.001 V
1 millivolt = 0.001 volts.
Real-world example
120 mV × 0.001 = 0.12 V
120 millivolts = 0.12 volts.
Conversion table
| Millivolt (mV) | Volt (V) |
|---|---|
| 1 mV | 0.001 V |
| 5 mV | 0.005 V |
| 12 mV | 0.012 V |
| 24 mV | 0.024 V |
| 120 mV | 0.12 V |
| 240 mV | 0.24 V |
Reverse conversion: Volt to Millivolt
0.001 V × 1000 = 1 mV
0.001 volts = 1 millivolt.
millivolts = volts × 1000
For a page dedicated to this direction, see Volt to Millivolt.
Understanding the Millivolt (mV)
Millivolt is 0.001 volt units.
Understanding the Volt
Volt (V) measures electric potential. The SI derived unit of electric potential difference, equal to one joule of energy per coulomb of charge. It is classified as a SI derived unit.
Where it's used: Universal — SI derived unit used worldwide
Uses of the Volt today
- Household and automotive electrical system ratings (120V/240V mains, 12V/24V batteries)
- Battery and power-supply specifications
- Electronics design
History of the Volt
The volt is named after Alessandro Volta (1745–1827), an Italian physicist who invented the voltaic pile in 1800 — the first device able to produce a steady electric current, and the direct ancestor of the modern battery.
Historical origin. Volt was not the invention of a single named person; it developed through the process described above.
Volt — sources
- BIPM SI Brochure, 9th edition — Definition of the volt as a coherent SI derived unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many volts are in 1 millivolt?
1 millivolt equals 0.001 volts, using the exact defined conversion factor rather than an estimate.
How do I convert millivolt to volt?
Multiply the millivolt value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert volt back to millivolt?
Use the reverse factor: 1 volt equals 1,000 millivolts. You can also use the swap control in the converter above to flip the direction instantly.
What is a millivolt?
Millivolt (mV) is a unit of electricity.
What is a volt?
Volt (V) measures electric potential. The SI derived unit of electric potential difference, equal to one joule of energy per coulomb of charge. It is classified as a SI derived unit.
Is the millivolt to volt conversion exact?
Yes. Both millivolt and volt are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.