Last updated: June 07, 2025

Nanoohm (nΩ) to Milliohm (mΩ) Converter

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Nanoohms to Milliohms (nΩ to mΩ) Converter

This article will show how to convert electrical resistance measurement units from nanoohms (nΩ) to milliohms (mΩ). We will cover essential definitions, provide examples, share relevant formulas, and present tables, along with answers to common questions.

Definitions of Ohm, Nanoohm, and Milliohm

Let’s get started by understanding the key definitions of Ohm (Ω), Nanoohm (nΩ), and Milliohm (mΩ). 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]

What is Ohm? The definition and illustration
What is Ohm (Ω)?

According to SI prefixes[2], which are based on powers of 10, an ohm (1 Ω) is equivalent to one billion nanoohms (109 or 1,000,000,000 nΩ).

Ohms to Nanoohms conversion scale
Ohms to nanoohms conversion scale

What is Nanoohm?

A nanoohm (nΩ) is a unit of electrical resistance in the SI system equal to one billionth (1/1,000,000,000) of an ohm (10-9 Ω).

What is Nanoohm (nΩ)?
What is Nanoohm (nΩ)?

Nanoohms become crucial only in extreme precision fields like superconductor research, quantum computing development, or aerospace material testing, where measuring near-zero resistance down to billionths of an ohm determines success or failure of cutting-edge technology.

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).

What is Milliohm (mΩ)?
What is Milliohm (mΩ)?

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.

nΩ to mΩ 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.

SI Prefixes and Values
SI multiples and submultiples

The nano- prefix in the International System of Units (SI) corresponds to a multiplier of 10-9 (0.000000001) while the milli- prefix represents 10-3 (0.001).

To convert nanoohms (nΩ) to milliohms (mΩ), divide the resistance value in nanoohms by 106 (1,000,000), since 1 milliohm equals 1,000,000 nanoohms.

R(mΩ) = R(nΩ) ÷ 106 = R(nΩ) ÷ 1,000,000

$$\text{R}_\text{(mΩ)} = \frac{\text{R}_\text{(nΩ)}}{1{,}000{,}000}$$

Or remember the nΩ-to-mΩ conversion factor: 1 nΩ = 10-6 = 0.000001 mΩ

nΩ to mΩ conversion table

The conversion table below provides a handy reference for converting electrical resistance measurement units from nanoohms (nΩ) to milliohms (mΩ). It covers a range from 0.1 nΩ to 1,000 nΩ, allowing for easy and quick conversions between these units of measurement.

Nanoohms (nΩ)Milliohms (mΩ)
0.1 nΩ0.0000001 mΩ
0.5 nΩ0.0000005 mΩ
1 nΩ0.000001 mΩ
2 nΩ0.000002 mΩ
4 nΩ0.000004 mΩ
5 nΩ0.000005 mΩ
10 nΩ0.00001 mΩ
20 nΩ0.00002 mΩ
30 nΩ0.00003 mΩ
40 nΩ0.00004 mΩ
50 nΩ0.00005 mΩ
60 nΩ0.00006 mΩ
70 nΩ0.00007 mΩ
80 nΩ0.00008 mΩ
90 nΩ0.00009 mΩ
100 nΩ0.0001 mΩ
200 nΩ0.0002 mΩ
500 nΩ0.0005 mΩ
800 nΩ0.0008 mΩ
1,000 nΩ0.001 mΩ
Nanoohms to milliohms (nΩ to mΩ) conversion table

Examples

Now, let's look at an example that illustrates the calculations required to convert from nanoohms to milliohms (nΩ to mΩ).

Example: Laboratory Calibration of Ultra-Low Value Resistors

In research laboratories, precise calibration of resistors is critical. Test equipment may capture connection resistances in nanoohms. Converting these values to milliohms ensures consistency with calibration standards.

If a resistor connection measures 2,500,000 nΩ, what is the equivalent value in milliohms?

Solution

Since 1 milliohm (mΩ) = 1,000,000 nanoohms (nΩ), we can convert 2,500,000 nΩ to milliohms by using the following formula:

$$\text{R}_\text{(mΩ)} = \frac{\text{R}_\text{(nΩ)}}{1{,}000{,}000}$$
$$\text{R}_\text{(mΩ)} = \frac{2{,}500{,}000}{1{,}000{,}000} = \boxed{2.5 \text{ mΩ}}$$

Therefore, the 2,500,000 nΩ electrical resistance is equivalent to 2.5 mΩ.

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

  1. Enter the value in nanoohms: For this example, enter 2,500,000 into the From box.
  2. View the result: The converter instantly calculates and displays the equivalent value in milliohms: 2.5 mΩ.
Nanoohms to milliohms converter example
Steps to convert from nanoohms to milliohms with our calculator

FAQs

Is 1 nanoohm or 1 milliohm larger?

A milliohm (mΩ) is a million times bigger than a nanoohm (nΩ). Here are the relationships between the units:

  • 1 mΩ = 106 = 1,000,000 nΩ
  • 1 nΩ = 10-6 = 1 ÷ 1,000,000 = 0.000001 mΩ

How to convert from nanoohms to milliohms?

To convert electrical resistance from nanoohms (nΩ) to milliohms (mΩ), follow these simple steps:

  • Step 1: Write down the electrical resistance value in nanoohms (nΩ).
  • Step 2: Divide it by a million (1,000,000).
  • Step 3: The result is the value of the electrical resistance in milliohms (mΩ).

Why do I need to convert nanoohms to milliohms?

Converting nanoohms to milliohms is important because nanoohms represent extremely small resistance values that are impractical to use directly in design and analysis. Since one milliohm equals 1,000,000 nanoohms, converting these values produces more manageable numbers that are easier to compare with standard specifications, integrate into simulation models, and document accurately.

This conversion simplifies calculations and reduces the risk of errors when working with ultra-low resistances in applications such as power electronics, high-speed interconnects, and precision laboratory measurements.

You now know how to convert electrical resistance from nanoohms (nΩ) to milliohms (mΩ). You can quickly use our calculator to convert between the electric resistance measurement units to save time for future calculations.

Nanoohm (nΩ) to Milliohm (mΩ) Converter

About this app

Nanoohm (nΩ) to Milliohm (mΩ) Converter

Our nanoohms to milliohms (nΩ to mΩ) converter is a simple web app for converting electrical resistance measurement units between nano-ohms (nΩ) and milli-ohms (mΩ), 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. (2025, May 25). Ohm.

    https://en.wikipedia.org/w/index.php?title=Ohm&oldid=1292104943
  2. ⬆️ Metric (SI) Prefixes | NIST. (2010, January 13). NIST.

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