AWG to mm² CONVERSION TABLE. AWG/kcmil. [mm²]*. 20. 0.52. 18. 0.82. 16. 1.31. 14. 2.08. 12. 3.31. 10. 5.26. 8. 8.36. 6. 13.3. 4. 21.2. 2. 33.6. 1. 42.4. 1/0....
When working with electrical wiring, it's crucial to understand the different units of measurement used to denote wire size. In the United States, wire gauge is often expressed in American Wire Gauge (AWG), while in Europe and many other parts of the world, it's expressed in square millimeters (mm²). This article will guide you through converting 1 AWG copper wire to mm².
American Wire Gauge (AWG) is a North American wire gauge system that measures the diameter of a round or wire rod. On the other hand, square millimeters (mm²) is a metric unit used to measure the cross-sectional area of a conductor. Understanding the relationship between these two units is essential for accurate conversions.
Converting 1 AWG copper wire to mm² involves using a conversion chart or formula. Here's a simple way to do it:

The formula to convert AWG to mm² is:
mm² = (36 - 2 * AWG)² / 400
Plugging in AWG = 1, we get:

mm² = (36 - 2 * 1)² / 400
mm² = 34.01 mm²
| AWG | mm² |
|---|---|
| 1 | 34.01 |
| 2 | 4.17 |
| 3 | 2.58 |
| 4 | 1.63 |
| 5 | 1.02 |
| 6 | 0.65 |
While converting, keep in mind that the AWG system is not linear, and the difference in size between consecutive gauges decreases as the gauge number increases. Also, the mm² system is more intuitive as it directly represents the cross-sectional area of the conductor.
Always double-check your conversions, especially when working with high-current applications, to ensure safety and compliance with local regulations.
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