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
.

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 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.

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
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 mV | 100 µV |
0.5 mV | 500 µV |
1 mV | 1,000 µV |
2 mV | 2,000 µV |
4 mV | 4,000 µV |
5 mV | 5,000 µV |
10 mV | 10,000 µV |
20 mV | 20,000 µV |
30 mV | 30,000 µV |
40 mV | 40,000 µV |
50 mV | 50,000 µV |
60 mV | 60,000 µV |
70 mV | 70,000 µV |
80 mV | 80,000 µV |
90 mV | 90,000 µV |
100 mV | 100,000 µV |
200 mV | 200,000 µV |
500 mV | 500,000 µV |
800 mV | 800,000 µV |
1,000 mV | 1,000,000 µV |
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:
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:
- Enter the value in millivolts – For this example, enter
7.8
into theFrom
box. - View the result – The converter instantly calculates and displays the equivalent value in microvolts:
7,800 µV
.

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.