AWG (American Wire Gauge) is used predominantly in North America for wire outside diameter and cross-section. Dimensions are defined by the ASTM B258 standard. AWG sizes with multiple zeros can be designated as number of zeros or number of zeros/0. Both metric wire cross-section and wire outside diameter can be calculated by formulas using just the AWG number. The formula for the wire outside diameter is: 0.127 mm * 92(32-n)/39 [mm]. The formula for metric wire cross-section is: 0.012668 mm2 * 92(36-n)/19.5 [mm2]. In both formulas, n is the AWG number.
This means for AWG = 1:
The metric wire outside diameter is 0.127 * 92(32-1)/39 = 7.348 mm.
The metric wire cross-section is 0.012668 mm2 * 92(36-1)/19.5 = 42.409 mm2.
AWG to metric conversion chart
AWG number |
Wire outside diameter [inch] |
Wire outside diameter [mm] |
Wire cross-section [mm2] |
---|---|---|---|
0000 (4/0) |
0.460 |
11.684 |
107.160 |
000 (3/0) |
0.410 |
10.405 |
84.970 |
00 (2/0) |
0.365 |
9.266 |
67.400 |
0 (1/0) |
0.325 |
8.251 |
53.460 |
1 |
0.289 |
7.348 |
42.409 |
2 |
0.258 |
6.544 |
33.632 |
3 |
0.229 |
5.827 |
26.671 |
4 |
0.204 |
5.189 |
21.151 |
5 |
0.182 |
4.621 |
16.774 |
6 |
0.162 |
4.115 |
13.302 |
7 |
0.144 |
3.665 |
10.549 |
8 |
0.128 |
3.264 |
8.366 |
9 |
0.114 |
2.906 |
6.634 |
10 |
0.102 |
2.588 |
5.261 |
11 |
0.0907 |
2.305 |
4.172 |
12 |
0.0808 |
2.053 |
3.309 |
13 |
0.0720 |
1.828 |
2.624 |
14 |
0.0641 |
1.628 |
2.081 |
15 |
0.0571 |
1.450 |
1.650 |
16 |
0.0508 |
1.291 |
1.309 |
17 |
0.0453 |
1.150 |
1.038 |
18 |
0.0403 |
1.024 |
0.823 |
19 |
0.0359 |
0.912 |
0.653 |
20 |
0.0320 |
0.812 |
0.518 |
21 |
0.0285 |
0.723 |
0.411 |
22 |
0.0253 |
0.644 |
0.326 |
23 |
0.0226 |
0.573 |
0.258 |
24 |
0.021 |
0.511 |
0.205 |
25 |
0.0179 |
0.455 |
0.162 |
26 |
0.0159 |
0.405 |
0.129 |
27 |
0.0142 |
0.361 |
0.102 |
28 |
0.0126 |
0.321 |
0.081 |
29 |
0.0113 |
0.286 |
0.064 |
30 |
0.010 |
0.255 |
0.051 |
31 |
0.00893 |
0.227 |
0.040 |
32 |
0.00795 |
0.202 |
0.032 |
33 |
0.00708 |
0.180 |
0.025 |
34 |
0.00631 |
0.160 |
0.020 |
35 |
0.00562 |
0.143 |
0.016 |
36 |
0.005 |
0.127 |
0.013 |
37 |
0.00445 |
0.113 |
0.010 |
38 |
0.00397 |
0.101 |
0.008 |
39 |
0.00353 |
0.090 |
0.006 |
40 |
0.00314 |
0.080 |
0.005 |