This article will show how to convert electrical resistance measurement units from milliohms (mΩ) to microohms (µΩ). We will cover essential definitions, provide examples, share relevant formulas, and present tables, along with answers to common questions.
Definitions of Ohm, Milliohm, and Microohm
Let’s get started by understanding the key definitions of Ohm (Ω), Milliohm (mΩ), and microohm (µΩ). Understanding these terms will enable you to perform conversions with confidence.
What is Ohm?
The ohm (Ω) is the SI derived unit of electrical resistance. It is defined as the resistance between two points of a conductor when a constant potential difference of one volt is applied across those points, producing a current of one ampere in the conductor, assuming no additional electromotive force is present.[1]
According to SI prefixes[2], which are based on powers of 10, an ohm (1 Ω) is equivalent to one thousand milliohms (103 mΩ or 1,000 mΩ).
What is Milliohm?
A milliohm (mΩ) is a unit of electrical resistance in the SI system equal to one thousandth (1/1,000) of an ohm (10-3 Ω).
It is commonly used in fields such as power distribution, precision electronic testing, and industrial motor evaluation. Accurately measuring very low resistance values is essential for determining the efficiency and reliability of these systems.
What is Microohm?
A microohm (µΩ) is a unit of electrical resistance in the SI system equal to one millionth (1/1,000,000) of an ohm (10-6 Ω).
It is vital for detecting hidden flaws in high-stakes systems like EV batteries, power grids, and industrial motors. Even a fraction of extra resistance here can cause overheating, energy waste, or catastrophic failures.
mΩ to µΩ 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) corresponds to a multiplier of 10-3 (0.001) while the micro- prefix represents 10-6 (0.000001).
To convert milliohms (mΩ) to microohms (µΩ), multiply the resistance value in milliohms by 103 (1,000), since 1 milliohm equals 1,000 microohms.
R(µΩ) = R(mΩ) × 103 = R(mΩ) × 1,000
Or remember the mΩ-to-µΩ conversion factor: 1 mΩ = 1,000 µΩ
mΩ to µΩ conversion table
The conversion table below provides a handy reference for converting electrical resistance measurement units from milliohms (mΩ) to microohms (µΩ). It covers a range from 0.1 mΩ to 1,000 mΩ, allowing for easy and quick conversions between these units of measurement.
| Milliohms (mΩ) | Microohms (µΩ) |
|---|---|
| 0.1 mΩ | 100 µΩ |
| 0.5 mΩ | 500 µΩ |
| 1 mΩ | 1,000 µΩ |
| 2 mΩ | 2,000 µΩ |
| 4 mΩ | 4,000 µΩ |
| 5 mΩ | 5,000 µΩ |
| 10 mΩ | 10,000 µΩ |
| 20 mΩ | 20,000 µΩ |
| 30 mΩ | 30,000 µΩ |
| 40 mΩ | 40,000 µΩ |
| 50 mΩ | 50,000 µΩ |
| 60 mΩ | 60,000 µΩ |
| 70 mΩ | 70,000 µΩ |
| 80 mΩ | 80,000 µΩ |
| 90 mΩ | 90,000 µΩ |
| 100 mΩ | 100,000 µΩ |
| 200 mΩ | 200,000 µΩ |
| 500 mΩ | 500,000 µΩ |
| 800 mΩ | 800,000 µΩ |
| 1,000 mΩ | 1,000,000 µΩ |
Examples
Now, let's look at an example that illustrates the calculations required to convert from milliohms to microohms (mΩ to µΩ).
Example: Battery Connector Quality Control
For high-performance batteries in electric vehicles, the connector resistance must be minimal to reduce energy loss. Expressing the resistance in microohms offers a clearer comparison with industry standards.
If a battery connector has a resistance of 5.2 mΩ, what is its value in microohms?
Solution
Since 1 milliohm (mΩ) = 1,000 microohms (µΩ), we can convert 5 mΩ to microohms by using the following formula:
Therefore, the 5.2 mΩ electrical resistance is equivalent to 5,200 µΩ.
To solve the problem with our calculator, follow the steps below:
- Enter the value in milliohms: For this example, enter
5.2into the From box. - View the result: The converter instantly calculates and displays the equivalent value in microohms:
5,200 µΩ.
FAQs
Is 1 milliohm or 1 microohm larger?
A milliohm (mΩ) is a thousand times bigger than a microohm (µΩ). Here are the relationships between the units:
1 mΩ = 103 = 1,000 µΩ1 µΩ = 10-3 = 1 ÷ 1,000 = 0.001 mΩ
How to convert from milliohms to microohms?
To convert electrical resistance from milliohms (mΩ) to microohms (µΩ), follow these simple steps:
- Step 1: Write down the electrical resistance value in milliohms (mΩ).
- Step 2: Multiply it by a thousand (
1,000). - Step 3: The result is the value of the electrical resistance in microoohms (µΩ).
Why do I need to convert milliohms to microohms?
Converting milliohms to microohms is especially useful when you are dealing with extremely small resistance values. When resistance values are so low that measurements in milliohms involve decimals or fractional numbers, converting to microohms offers a whole-number expression that is easier to interpret and compare.
For instance, a resistance measured at 0.005 mΩ can be expressed as 5,000 µΩ. This conversion removes the ambiguity of small decimal values and reduces the risk of misinterpretation during precise measurements and analyses.
You now know how to convert electrical resistance from milliohms (mΩ) to microohms (µΩ). You can quickly use our calculator to convert between the electric resistance measurement units to save time for future calculations.
