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Volt to Millivolt Converter

1 volt is exactly 1000 millivolts. Convert volts (V) to millivolts (mV) below: type a value and the result updates as you type.

V to mV calculator

Dot or comma decimals and scientific notation (1e-3) work.

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Result

Volt to Millivolt conversion

1 V = 1000 mVone volt in millivolts

1 mV = 0.001 Vone millivolt in volts

Volt (V): SI unit of electric potential difference (voltage): one watt per ampere.

Millivolt (mV): One thousandth of a volt. Thermocouples and sensors output millivolts.

Source:SI Brochure, 9th edition (BIPM, 2019)

How to convert volts to millivolts

To convert volts to millivolts, multiply the number of volts by 1000.

Formula

mV = V × 1000

Examples

  • 5 V = 5 × 1000 = 5000 mV
  • 25 V = 25 × 1000 = 25000 mV
  • 100 V = 100 × 1000 = 100000 mV

Volt to Millivolt conversion table

Volt to Millivolt
Volt (V)Millivolt (mV)
0.1 V100 mV
0.5 V500 mV
1 V1000 mV
2 V2000 mV
3 V3000 mV
5 V5000 mV
10 V10000 mV
20 V20000 mV
25 V25000 mV
50 V50000 mV
100 V100000 mV
250 V250000 mV
500 V500000 mV
1000 V1000000 mV

Values rounded to 10 significant digits where needed.

Frequently asked questions

How many millivolts are in one volt?
One volt is exactly 1000 millivolts.
How do I convert millivolts to volts?
To convert millivolts to volts, multiply the number of millivolts by 0.001. The formula is V = mV × 0.001.
Is this conversion exact?
Yes. Both units have exact definitions and the factor 1000 is exact. Displayed results are only rounded when they have many decimal places.
Which is larger, a volt or a millivolt?
A volt is 1000 times larger than a millivolt. In other words, a millivolt is exactly 1/1000 of a volt.