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The Birmingham Wire Gauge (BWG) and the Standard Wire Gauge (SWG) are two different systems for measuring the thickness or diameter of wire. Here’s a comparison chart that shows the wire sizes in both BWG and SWG, along with their corresponding diameters in inches and millimeters:
| BWG | SWG | Diameter (inches) | Diameter (mm) |
|---|---|---|---|
| 0000 | 0 | 0.454 | 11.58 |
| 000 | 1 | 0.425 | 10.79 |
| 00 | 2 | 0.380 | 9.65 |
| 0 | 3 | 0.340 | 8.61 |
| 1 | 4 | 0.300 | 7.62 |
| 2 | 5 | 0.269 | 6.86 |
| 3 | 6 | 0.239 | 6.07 |
| 4 | 7 | 0.224 | 5.69 |
| 5 | 8 | 0.207 | 5.26 |
| 6 | 9 | 0.192 | 4.88 |
| 7 | 10 | 0.177 | 4.50 |
| 8 | 11 | 0.162 | 4.12 |
| 9 | 12 | 0.148 | 3.76 |
| 10 | 13 | 0.134 | 3.40 |
| 11 | 14 | 0.120 | 3.05 |
| 12 | 15 | 0.105 | 2.67 |
| 13 | 16 | 0.091 | 2.31 |
| 14 | 17 | 0.080 | 2.03 |
| 15 | 18 | 0.072 | 1.83 |
| 16 | 19 | 0.065 | 1.65 |
| 17 | 20 | 0.058 | 1.47 |
| 18 | 21 | 0.049 | 1.24 |
| 19 | 22 | 0.042 | 1.07 |
| 20 | 23 | 0.035 | 0.89 |
| 21 | 24 | 0.032 | 0.81 |
| 22 | 25 | 0.028 | 0.71 |
| 23 | 26 | 0.025 | 0.64 |
| 24 | 27 | 0.022 | 0.56 |
| 25 | 28 | 0.020 | 0.51 |
| 26 | 29 | 0.018 | 0.46 |
| 27 | 30 | 0.016 | 0.41 |
| 28 | 31 | 0.014 | 0.36 |
| 29 | 32 | 0.013 | 0.33 |
| 30 | 33 | 0.012 | 0.30 |
Please note that there may be slight variations in wire gauge standards depending on the industry and region, so it’s important to double-check the specific standards and requirements for your application.