Last updated: May 13, 2025

Millivolt to Microvolt Converter

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This article will show how to convert voltage measurement units from millivolts (mV) to microvolts (µV). We will cover essential definitions, provide examples, share relevant formulas, and present tables, along with answers to common questions.

Definitions of Volt, Millivolt, and Microvolt

Let’s get started by understanding the key definitions of Volt (V), Millivolt (mV), and Microvolt (µV). Understanding these terms will allow you to perform conversions confidently.

What is Volt (V)?

A volt (V) is the SI (International System of Units) unit of electric potential and voltage. It measures the difference in electric energy between two points in a circuit. One volt means one ampere of current uses one watt of power.[1]

According to SI prefixes[2], which are based on powers of 10, a volt (1 V) is equivalent to one thousand millivolts, or 103 mV, or 1,000 mV.

Definition and illustration of a volt.
What is a Volt? The definition and illustration.

What is Millivolt (mV)?

A millivolt (mV) is a unit of electrical potential equal to one-thousandth (1/1,000) of a volt (0.001 V). It is widely utilized in applications requiring precise measurement of low voltages, such as sensor outputs (e.g., temperature, biomedical devices) and small-scale electronic circuits where minimal electrical signals must be accurately captured and analyzed. Its compact scale makes it ideal for systems sensitive to higher voltage levels.

What is Millivolt (mV)?
What is a Millivolt? The definition and illustration.

What is Microvolt (µV)?

A microvolt (µV) is a unit of electrical potential equal to one-millionth (1/1,000,000) of a volt (0.000001 V). It is commonly used in applications requiring high-precision voltage measurements, such as biomedical sensors (e.g., EEG and ECG devices), seismic monitoring, and radio signal detection, where extremely small electrical signals must be accurately captured and analyzed.

What is Microvolt (µV)?
What is a Microvolt?

Its fine resolution makes it essential for systems sensitive to even the slightest voltage variations.

mV to µV formula

Let’s take a closer look at the conversion formula so you can carry out these conversions independently, whether using a calculator or doing it manually with pencil and paper.

The milli- prefix in the International System of Units (SI) represents a multiplier of 10-3 (0.001) while the micro- represents a multiplier of 10-6 (0.000001).

So, to convert from millivolts to microvolts, multiply the number of millivolts (V(mV)) by 1,000.

V(µV) = V(mV) × 103 = V(mV) × 1,000

$$\text{V}_\text{(µV)} = \text{V}_\text{(mV)} \times 1{,}000$$

Or remember the mV-to-µV conversion factor: 1 mV = 103 = 1,000 µV

mV to µV conversion table

The conversion table below provides a handy reference for converting voltage measurement units from millivolts (mV) to microvolts (µV). It covers a range from 0.1 mV to 1,000 mV, allowing for easy and quick conversions between both units of measurement.

Millivolts (mV)Microvolts (µV)
0.1 mV100 µV
0.5 mV500 µV
1 mV1,000 µV
2 mV2,000 µV
4 mV4,000 µV
5 mV5,000 µV
10 mV10,000 µV
20 mV20,000 µV
30 mV30,000 µV
40 mV40,000 µV
50 mV50,000 µV
60 mV60,000 µV
70 mV70,000 µV
80 mV80,000 µV
90 mV90,000 µV
100 mV100,000 µV
200 mV200,000 µV
500 mV500,000 µV
800 mV800,000 µV
1,000 mV1,000,000 µV
Millivolts (mV) to microvolts (µV) conversion table

Examples

Now, let's look at an example that illustrates the calculations required to convert from millivolts to microvolts (mV to µV).

Example: Calibrating Precision Instruments in Laboratory Experiments

A researcher is calibrating a high-precision voltage measurement device that registers 7.8 millivolts (mV). However, laboratory reports and scientific documentation require voltage values in microvolts (µV) for finer resolution and detailed analysis.

Solution

Since 1 millivolt (mV) = 1,000 microvolts (µV), we can convert 7.8 mV to microvolts by using the following formula:

$$\text{V}_\text{(µV)} = \text{V}_\text{(mV)} \times 1{,}000$$
$$\text{V}_\text{(µV)} = 7.8 \times 1{,}000 = \boxed{7,800 \text{ µV}}$$

Therefore, the 7.8 mV output voltage of the device is equivalent to 7,800 µV.

To solve the problem with our calculator, follow the steps below:

  1. Enter the value in millivolts – For this example, enter 7.8 into the From box.
  2. View the result – The converter instantly calculates and displays the equivalent value in microvolts: 7,800 µV.
Millivolt to Microvolt Converter Example
Steps to convert from millivolts to microvolts with our calculator

FAQs

Is 1 millivolt or 1 microvolt larger?

A millivolt (mV) is a thousand times bigger than a microvolt (µV). Here are the relationships between the units:

  • 1 mV = 103 = 1,000 µV
  • 1 µV = 10-3 = 1 ÷ 1,000 = 0.001 mV

How to convert from millivolts to microvolts?

To convert voltage from millivolts (mV) to microvolts (µV), follow these simple steps:

  • Write down the voltage value in millivolts (mV).
  • Multiply it by the value of a mV-to-µV conversion factor: 1,000.
  • The result of the multiplication is the value of the voltage in microvolts (µV).

Why do I need to convert from millivolts to microvolts?

Converting millivolts (mV) to microvolts (µV) is necessary when working with extremely small voltage signals in scientific, medical, and engineering applications. Since 1 mV = 1,000 µV, expressing voltage in microvolts improves precision, ensures accurate measurements, and enhances signal analysis.

You now know how to convert voltage from millivolts (mV) to microvolts (µV). You can quickly use our calculator to convert between the voltage measurement units to save time for future calculations.

Millivolt to Microvolt Converter

About this app

Millivolt to Microvolt Converter

The millivolts to microvolts (mV to µV) converter is a simple web app for converting voltage measurement units between millivolts (mV) and microvolts (µV), with explanations, formulas, examples, and tables.

Availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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References

2 Sources

  1. ⬆️ Wikipedia contributors. (2024, December 20). Volt. In Wikipedia, The Free Encyclopedia. Retrieved 03:40, May 9, 2025, from

    https://en.wikipedia.org/w/index.php?title=Volt&oldid=1264114537
  2. ⬆️ Metric (SI) Prefixes | NIST. (2010, January 13). NIST.

    https://www.nist.gov/pml/owm/metric-si-prefixes