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Volts to Millivolts Converter

Convert volts (V) to millivolts (mV), and back, instantly.

What this tool does

Convert volts (V) to millivolts (mV), and back, instantly. Type an amount in volts, choose the units, and the tool converts it to millivolts. It converts between these two voltage units, in either direction.

Inputs

  • Value: A number.
  • From: Choose one: Volt, Millivolt. Starts as Volt.
  • To: Choose one of the same 2 units as "From". Starts as Millivolt.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount. It appears once every required field has a valid value.

Worked examples

Conversions from volts to millivolts:

  • 1 V = 1,000 mV
  • 5 V = 5,000 mV
  • 10 V = 10,000 mV
  • 50 V = 50,000 mV
  • 100 V = 100,000 mV

Multiply the number of volts by 1,000 to get millivolts. Both units are exact definitions, so 1,000 is the exact factor: 1 V = 1,000 mV.

Sources: Volt: SI Brochure, 9th edition (2019). Millivolt: SI Brochure, 9th edition (2019, updated 2022), Table 7 (SI prefixes).

Limitations

  • Converts the unit of a voltage only. It does not work out voltage from current, resistance or power.

FAQs

Q: How many millivolts is one volt?
A: One volt is 1,000 millivolts. Pick volt as the From unit and millivolt as the To unit to see it for any value.
Q: Can I convert the other way, from millivolts to volts?
A: Yes. Choose millivolt in the From box and volt in the To box. One millivolt is 0.001 volt.

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