Millivolts to Volts Converter

Convert millivolt to volt instantly. 1 mV = 0.001 V, worked steps and a full reference table.

Formula

V = mV × 0.001

How to use it

Type the value in millivolt — the result updates as you type.
Use Swap to flip the direction, or change either dropdown to convert between any two units.
Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.

Examples

1 mV	0.001 V
5 mV	0.005 V
10 mV	0.01 V
100 mV	0.1 V

One millivolt equals 0.001 volts (V). To convert millivolts to volts, multiply by 0.001; to go back the other way, multiply by 1000 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What millivolts and volts actually measure

Millivolt (mV) — A millivolt is a thousandth of a volt. Thermocouples, sensor outputs and ECG traces.

Volt (V) — The volt is the SI unit of potential difference — one joule per coulomb. Batteries, mains supply and virtually all electronics.

Millivolts to Volts conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

mV	V
1 mV	0.001 V
2 mV	0.002 V
5 mV	0.005 V
10 mV	0.01 V
25 mV	0.025 V
50 mV	0.05 V
100 mV	0.1 V

How to convert millivolts to volts by hand

Multiply the number of millivolts by 0.001.

For example, 25 mV × 0.001 = 0.025 V.

Going the other way, divide by 0.001 — or multiply by 1000, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.

Questions people ask

How many V are in 1 mV?

1 mV equals exactly 0.001 V. Multiply any value in millivolt by 0.001 to get volt.

Is anything uploaded to a server?

No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.

Runs entirely in your browser. Nothing you type is uploaded, logged or shared.

Last updated 18 August 2026