AWG Wire Table
American Wire Gauge diameter, area, resistance and ampacity.
| AWG | Diameter (mm) | Area (mm²) | R (Ω/km) | Ampacity (A) |
|---|---|---|---|---|
4/0 |
11.684 | 107.2 | 0.161 | 380 |
3/0 |
10.405 | 85 | 0.203 | 328 |
2/0 |
9.266 | 67.4 | 0.256 | 283 |
1/0 |
8.252 | 53.5 | 0.322 | 245 |
1 |
7.348 | 42.4 | 0.407 | 211 |
2 |
6.544 | 33.6 | 0.513 | 181 |
4 |
5.189 | 21.2 | 0.815 | 135 |
6 |
4.115 | 13.3 | 1.296 | 101 |
8 |
3.264 | 8.37 | 2.061 | 73 |
10 |
2.588 | 5.26 | 3.277 | 55 |
12 |
2.053 | 3.31 | 5.211 | 41 |
14 |
1.628 | 2.08 | 8.286 | 32 |
16 |
1.291 | 1.31 | 13.17 | 22 |
18 |
1.024 | 0.823 | 20.95 | 16 |
20 |
0.812 | 0.518 | 33.31 | 11 |
22 |
0.644 | 0.326 | 52.96 | 7 |
24 |
0.511 | 0.205 | 84.22 | 3.5 |
26 |
0.405 | 0.129 | 133.9 | 2.2 |
28 |
0.321 | 0.081 | 212.9 | 1.4 |
30 |
0.255 | 0.051 | 338.6 | 0.86 |
Ampacity is a rough chassis-wiring value at 20 °C. Real values depend on insulation, bundling and ambient temperature — consult NEC tables for code-compliant figures.
About this tool
Look up standard AWG wire sizes for copper: diameter in mm, cross-sectional area in mm², resistance per km at 20 °C and rough ampacity.