Convert AWG to Inches & Millimeters ... When choosing a wire cutter, you must first determine the size/gauge of wire you will be cutting. This handy chart will�...
In the world of electrical work, wire gauges are often measured in American Wire Gauge (AWG). However, sometimes you might need to convert these gauges to inches to ensure the correct fit for your project. This article will guide you through the process of AWG to inches conversion, making it easier for you to work with different wire sizes.
Converting AWG to inches is crucial when you need to match the wire size to a specific hole diameter or when you're working with hardware that's measured in inches. It's also helpful for understanding the physical size of the wire, as AWG can be quite abstract.
Before we dive into the conversion, let's briefly understand the AWG system. It's a logarithmic scale where each gauge number corresponds to a specific wire diameter. The smaller the gauge number, the larger the wire diameter. For instance, a 12 AWG wire is thicker than a 20 AWG wire.

The conversion between AWG and inches involves a few constants. The diameter of a wire in inches (D) can be calculated using the formula:
D = (36 - 2 * AWG) / 32
And to convert inches to AWG, use this formula:

AWG = 36 - 32 * D
Let's use the first formula to convert some AWG sizes to inches:
| AWG | Diameter (in inches) |
|---|---|
| 12 | 0.080 |
| 16 | 0.051 |
| 20 | 0.032 |
Now, let's convert some inch measurements to AWG using the second formula:
| Diameter (in inches) | AWG |
|---|---|
| 0.080 | 12 |
| 0.051 | 16 |
| 0.032 | 20 |
Here are some common AWG to inches conversions for quick reference:
Remember, these conversions are based on the standard AWG system. Some specialty wires may have different diameters, so always double-check if you're unsure.
Now that you understand how to convert AWG to inches, you can tackle your electrical projects with confidence. Whether you're working with Romex, THHN, or other types of wire, these conversions will help you ensure a safe and accurate installation.
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