Wire Gauge Chart
| AWG | Diameter (mm) | Diameter (in) | Area (mm²) | Copper (Ω/km) | Copper (Ω/1000 ft) |
| 4/0 | 11.684 | 0.4600 | 107.22 | 0.1608 | 0.0490 |
| 3/0 | 10.405 | 0.4096 | 85.03 | 0.2028 | 0.0618 |
| 2/0 | 9.266 | 0.3648 | 67.43 | 0.2557 | 0.0779 |
| 0 | 8.251 | 0.3249 | 53.48 | 0.3224 | 0.0983 |
| 1 | 7.348 | 0.2893 | 42.41 | 0.4065 | 0.1239 |
| 2 | 6.544 | 0.2576 | 33.63 | 0.5126 | 0.1562 |
| 3 | 5.827 | 0.2294 | 26.67 | 0.6464 | 0.1970 |
| 4 | 5.189 | 0.2043 | 21.15 | 0.8151 | 0.2484 |
| 5 | 4.621 | 0.1819 | 16.77 | 1.03 | 0.3133 |
| 6 | 4.115 | 0.1620 | 13.30 | 1.30 | 0.3950 |
| 7 | 3.665 | 0.1443 | 10.55 | 1.63 | 0.4981 |
| 8 | 3.264 | 0.1285 | 8.37 | 2.06 | 0.6281 |
| 9 | 2.906 | 0.1144 | 6.63 | 2.60 | 0.7921 |
| 10 | 2.588 | 0.1019 | 5.26 | 3.28 | 0.9988 |
| 11 | 2.305 | 0.0907 | 4.17 | 4.13 | 1.26 |
| 12 | 2.053 | 0.0808 | 3.31 | 5.21 | 1.59 |
| 13 | 1.828 | 0.0720 | 2.62 | 6.57 | 2.00 |
| 14 | 1.628 | 0.0641 | 2.08 | 8.28 | 2.53 |
| 15 | 1.450 | 0.0571 | 1.65 | 10.45 | 3.18 |
| 16 | 1.291 | 0.0508 | 1.31 | 13.17 | 4.02 |
| 17 | 1.150 | 0.0453 | 1.04 | 16.61 | 5.06 |
| 18 | 1.024 | 0.0403 | 0.8230 | 20.95 | 6.38 |
| 19 | 0.912 | 0.0359 | 0.6527 | 26.41 | 8.05 |
| 20 | 0.812 | 0.0320 | 0.5176 | 33.31 | 10.15 |
| 21 | 0.723 | 0.0285 | 0.4105 | 42.00 | 12.80 |
| 22 | 0.644 | 0.0253 | 0.3255 | 52.96 | 16.14 |
| 23 | 0.573 | 0.0226 | 0.2582 | 66.78 | 20.35 |
| 24 | 0.511 | 0.0201 | 0.2047 | 84.21 | 25.67 |
| 25 | 0.455 | 0.0179 | 0.1624 | 106.18 | 32.37 |
| 26 | 0.405 | 0.0159 | 0.1288 | 133.90 | 40.81 |
| 27 | 0.361 | 0.0142 | 0.1021 | 168.84 | 51.46 |
| 28 | 0.321 | 0.0126 | 0.0810 | 212.90 | 64.89 |
| 29 | 0.286 | 0.0113 | 0.0642 | 268.47 | 81.83 |
| 30 | 0.255 | 0.0100 | 0.0509 | 338.53 | 103.18 |
| 31 | 0.227 | 0.0089 | 0.0404 | 426.88 | 130.11 |
| 32 | 0.202 | 0.0080 | 0.0320 | 538.28 | 164.07 |
| 33 | 0.180 | 0.0071 | 0.0254 | 678.76 | 206.89 |
| 34 | 0.160 | 0.0063 | 0.0201 | 855.91 | 260.88 |
| 35 | 0.143 | 0.0056 | 0.0160 | 1079.28 | 328.96 |
| 36 | 0.127 | 0.0050 | 0.0127 | 1360.94 | 414.82 |
| 37 | 0.113 | 0.0045 | 0.0100 | 1716.12 | 523.07 |
| 38 | 0.101 | 0.0040 | 0.0080 | 2163.98 | 659.58 |
| 39 | 0.090 | 0.0035 | 0.0063 | 2728.73 | 831.72 |
| 40 | 0.080 | 0.0031 | 0.0050 | 3440.87 | 1048.78 |
How to use Wire Gauge Chart
- Find the AWG size in the first column.
- Read its diameter, cross-section in mm² and the resistance of copper wire at 20 °C.
Frequently asked questions
How do I convert AWG to mm²?
Find the size in the table: 12 AWG is about 3.31 mm², 14 AWG about 2.08 mm² and 10 AWG about 5.26 mm².
Does the chart give current ratings?
No. How much current a wire can carry depends on its insulation, how it is installed and local rules.
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