AWG to Metric Conversion Chart. AWG Number Ø [Inch] Ø [mm] Ø [mm²] Resistance [Ohm/m]. 4/0 = 0000. 0.460. 11.7. 107. 0.000161. 3/0 = 000. 0.410. 10.4. 85.0....
When working with electrical wiring, it's crucial to understand the gauge sizes of the wires you're using. Two common systems for measuring wire gauge are American Wire Gauge (AWG) and millimeters (mm). This guide will help you convert AWG to mm wire gauge effortlessly, ensuring you always have the right wire for your project.
AWG is a standard used primarily in North America to measure the diameter of electrical wires. It was established in 1857 and is based on a logarithmic scale, meaning each gauge size is approximately 1.12 times larger than the previous one. The AWG system is unique in that smaller numbers represent larger wire diameters.
The millimeter system, on the other hand, is a metric unit of measurement used globally. It's a direct measurement of the wire's diameter in millimeters. This system is more intuitive, as larger numbers represent larger diameters. Understanding the conversion between AWG and mm is essential for international projects or when working with wires from different regions.

Converting AWG to mm is vital for several reasons. Firstly, it helps ensure you're using the correct wire diameter for your project, preventing potential hazards and ensuring optimal performance. Secondly, it allows you to compare and contrast wires from different regions or manufacturers, making it easier to make informed decisions. Lastly, it's a fundamental skill for any electrician or DIY enthusiast working with electrical wiring.
Converting AWG to mm is a straightforward process. Here's a simple formula to help you make the conversion:
mm = 0.127 * (36 - 2 * AWG)

Alternatively, you can use the following table for quick reference:
| American Wire Gauge (AWG) | Millimeters (mm) |
|---|---|
| 10 | 2.58 |
| 12 | 2.05 |
| 14 | 1.63 |
| 16 | 1.29 |
| 18 | 1.02 |
| 20 | 0.81 |
| 22 | 0.64 |
| 24 | 0.51 |
Here are some common AWG to mm conversions for quick reference:
Here are some tips to ensure accurate conversion between AWG and mm:
Understanding how to convert AWG to mm is an invaluable skill for anyone working with electrical wiring. By mastering this conversion, you'll ensure you're using the correct wire for your project, enhancing safety and performance. So, the next time you're faced with a wire gauge challenge, you'll be ready to tackle it with confidence.
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