Der Durchmesser in Millimetern (mm) eines Drahtes mit einer bestimmten AWG-Nummer kann mithilfe einer mathematischen Formel berechnet werden. Die Formel basiert...
In the realm of electrical engineering and electronics, two common units of measurement for wire gauge are American Wire Gauge (AWG) and square millimeters (mm²). While both systems serve the same purpose, they originate from different regions and have distinct scales. This article aims to demystify the relationship between AWG and mm², helping you convert between the two systems with ease.
AWG is a standard used primarily in North America to measure the diameter of electrical wire. It was established in 1857 and has since been widely adopted in the region. The AWG scale is based on a logarithmic scale, which means that each increment in gauge represents a specific percentage decrease in cross-sectional area. The smaller the AWG number, the larger the wire diameter.
Square millimeters is a metric unit used to measure the cross-sectional area of electrical conductors. It is widely used in Europe, Asia, and other parts of the world. Unlike AWG, the mm² system is straightforward: a larger number indicates a larger wire diameter.

| mm² | AWG |
|---|---|
| 2.5 | 13 |
| 4 | 11 |
| 6 | 9 |
To convert AWG to mm², you can use the following formula:
mm² = (36 / (36 - 2 * AWG))^2
For example, to convert AWG 12 to mm²:
mm² = (36 / (36 - 2 * 12))^2 ≈ 3.3
Accurately knowing the wire gauge is crucial in electrical engineering and electronics. Incorrect gauge can lead to poor performance, increased resistance, or even safety hazards. By understanding the conversion between AWG and mm², you can ensure you're using the right wire for your specific application, regardless of the system used in your region.
In conclusion, while AWG and mm² are distinct systems for measuring wire gauge, they serve the same purpose and can be easily converted between one another. By familiarizing yourself with the relationship between these two systems, you'll be better equipped to handle a wide range of electrical and electronic projects.
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