American Wire Gauge (AWG) and Standard Wire Gauge (SWG/Imperial) comparison for copper wire
| AWG | AWG Dia (mm) | AWG Area (mm²) | AWG Ω/km | SWG | SWG Dia (mm) | SWG Area (mm²) | SWG Ω/km |
|---|---|---|---|---|---|---|---|
| 4/0 | 11.68 | 107.2 | 0.161 | 7/0 | 12.70 | 126.7 | 0.136 |
| 3/0 | 10.40 | 85.0 | 0.203 | 6/0 | 11.79 | 109.1 | 0.158 |
| 2/0 | 9.27 | 67.4 | 0.256 | 5/0 | 10.97 | 94.5 | 0.183 |
| 1/0 | 8.25 | 53.5 | 0.323 | 4/0 | 10.16 | 81.1 | 0.213 |
| 1 | 7.35 | 42.4 | 0.407 | 3/0 | 9.45 | 70.1 | 0.246 |
| 2 | 6.54 | 33.6 | 0.513 | 2/0 | 8.84 | 61.4 | 0.281 |
| 4 | 5.19 | 21.2 | 0.815 | 1 | 7.62 | 45.6 | 0.379 |
| 6 | 4.11 | 13.3 | 1.30 | 3 | 6.40 | 32.2 | 0.537 |
| 8 | 3.26 | 8.37 | 2.06 | 6 | 4.88 | 18.7 | 0.923 |
| 10 | 2.59 | 5.26 | 3.28 | 8 | 4.06 | 13.0 | 1.33 |
| 12 | 2.05 | 3.31 | 5.21 | 10 | 3.25 | 8.30 | 2.08 |
| 14 | 1.63 | 2.08 | 8.28 | 12 | 2.64 | 5.48 | 3.15 |
| 16 | 1.29 | 1.31 | 13.2 | 14 | 2.03 | 3.24 | 5.33 |
| 18 | 1.02 | 0.82 | 21.0 | 16 | 1.63 | 2.08 | 8.28 |
| 20 | 0.81 | 0.52 | 33.3 | 18 | 1.22 | 1.17 | 14.8 |
| 22 | 0.64 | 0.33 | 53.0 | 20 | 0.91 | 0.65 | 26.5 |
| 24 | 0.51 | 0.20 | 84.2 | 22 | 0.71 | 0.40 | 43.5 |
| 26 | 0.40 | 0.13 | 134 | 24 | 0.56 | 0.25 | 69.6 |
| 28 | 0.32 | 0.08 | 213 | 26 | 0.46 | 0.16 | 106 |
| 30 | 0.25 | 0.05 | 339 | 28 | 0.38 | 0.11 | 155 |
| 32 | 0.20 | 0.03 | 538 | 30 | 0.31 | 0.08 | 224 |
| 34 | 0.16 | 0.02 | 856 | 32 | 0.27 | 0.06 | 298 |
| 36 | 0.13 | 0.013 | 1360 | 34 | 0.23 | 0.04 | 414 |
| 38 | 0.10 | 0.008 | 2160 | 36 | 0.19 | 0.03 | 589 |
| 40 | 0.08 | 0.005 | 3440 | 38 | 0.15 | 0.02 | 930 |