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Converters

Electric Voltage Converter

Convert electric voltage accurately between picovolts, nanovolts, microvolts, millivolts, volts, kilovolts and megavolts using exact SI decimal prefixes.

Example: a potential difference is 2,500 millivolts. How many volts is that?
Result 2.5 V 2,500 mV = 2.5 V
One-unit equivalent 1 mV = 0.001 V A quick way to understand the relationship between the two units.

✓ The volt and SI-prefix relationships match definitions from the National Institute of Standards and Technology (NIST)

How is the conversion calculated? The volt (V) is the SI derived unit of electric potential difference, with 1 volt equal to 1 watt per ampere. Pico, nano, micro, milli, kilo and mega use exact decimal SI prefixes. Negative values are also supported to preserve the sign of potential difference relative to the chosen reference.

This calculation runs in your browser. Your values are not sent to our server.

How it works

  1. Enter a voltage value, then choose the source and target units.
  2. Example: 2,500 millivolts equals exactly 2.5 volts.
  3. The volt (V) is the SI derived unit of electric potential difference; 1 V = 1 W/A.
  4. Pico, nano, micro, milli, kilo and mega use the exact SI decimal prefixes 10⁻¹², 10⁻⁹, 10⁻⁶, 10⁻³, 10³ and 10⁶.
  5. Signed values are supported because voltage can be positive or negative relative to a chosen reference potential.
  6. This tool converts voltage units only; it does not calculate current, resistance or electrical power.

FAQ

How many millivolts are in 1 volt?

1 volt equals exactly 1,000 millivolts.

How many volts are in 2,500 millivolts?

2,500 millivolts equals exactly 2.5 volts.

How many microvolts are in 1 volt?

1 volt equals exactly 1,000,000 microvolts.

Can voltage be negative?

Yes. Voltage is a potential difference measured relative to a reference, so this converter preserves negative values.

Does this tool calculate electrical power?

No. It converts voltage units only. Power calculations require other quantities such as current.

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