AWG American Wire Gauge

This classification scheme for copper wires both solid and stranded was introduced by J. R. Brown in 1857. It is still in use. As you might expect there is no mathematical relation to a metric measure system...

AWG number	conductor structure n x AWG	wire diameter n x [mm]	cross section [mm²]	total conductor diameter [mm]	copper resistance¹ [ohm/km]
1	1x1	1x7.35	42.4	7.35	0.4
1	259x25	259x0.45	42.1	9.50	0.4
1	817x30	817x0.25	41.4	9.70	0.4
2	1x2	1x6.54	33.6	6.54	0.5
2	133x23	133x0.57	34.4	8.60	0.5
2	665x30	665x0.25	33.8	8.60	0.5
3	1x3	1x5.83	26.7	5.83	0.6
3	133x24	133x0.51	27.2	7.60	0.6
4	1x4	1x5.19	21.1	5.19	0.8
4	133x25	133x0.45	21.6	6.95	0.8
5	1x5	1x4.62	16.8	4.62	1.0
6	1x6	1x4.11	13.2	4.11	1.3
6	133x27	133x0.36	13.6	5.51	1.2
7	1x7	1x3.66	10.5	3.67	1.6
8	1x8	1x3.26	8.37	3.26	2.0
8	133x29	133x0.29	8.61	4.38	1.9
9	1x9	1x2.91	6.83	2.91	2.4
10	1x10	1x2.59	5.26	2.59	3.2
10	105x30	105x0.25	5.32	2.85	3.1
11	1x11	1x2.30	4.17	2.30	4.0
12	1x12	1x2.05	3.31	2.05	5.5
12	18x25	18x0.45	3.09	2.24	5.4
12	37x28	37x0.32	2.99	2.31	5.6
13	1x13	1x1.83	2.70	1.83	6.8
14	1x14	1x1.63	2.08	1.63	8.6
14	18x27	18x0.36	1.94	1.76	8.6
14	41x30	41x0.25	2.08	1.83	8.0
15	1x15	1x1.45	1.65	1.45	10
16	1x16	1x1.29	1.31	1.29	13
16	18x29	18x0.29	1.23	1.40	13
16	28x30	28x0.25	1.32	1.47	13
17	1x17	1x1.15	1.04	1.15	16
18	1x18	1x1.27	0.824	1.03	22
18	7x26	7x0.40	0.897	1.03	19
18	19x30	19x0.25	0.963	1.02	17
19	1x19	1x0.91	0.653	0.91	26
20	1x20	1x0.81	0.519	0.81	32
20	7x28	7x0.32	0.563	1.01	30
20	10x30	10x0.25	0.507	0.97	33
21	1x21	1x0.72	0.412	0.72	41
22	1x22	1x0.64	0.325	0.64	52
22	7x30	7x0.25	0.355	0.80	47
22	19x34	19x0.16	0.382	0.78	44
23	1x23	1x0.57	0.259	0.57	65
24	1x24	1x0.51	0.205	0.51	88
24	7x32	7x0.20	0.227	0.64	74
24	19x36	19x0.13	0.241	0.62	70
25	1x25	1x0.45	0.163	0.45	108
26	1x26	1x0.40	0.128	0.40	137
26	7x34	7x0.16	0.140	0.50	120
26	19x38	19x0.10	0.154	0.50	109
27	1x27	1x0.36	0.102	0.36	178
28	1x28	1x0.32	0.080	0.32	209
28	7x36	7x0.13	0.089	0.40	188
28	19x40	19x0.08	0.092	0.39	182
29	1x29	1x0.29	0.065	0.29	243
30	1x30	1x0.25	0.051	0.25	351
30	7x38	7x0.10	0.057	0.33	294
30	19x42	19x0.06	0.057	0.36	294
31	1x31	1x0.23	0.040	0.23	420
32	1x32	1x0.20	0.032	0.20	547
32	7x40	7x0.08	0.034	0.26	492
33	1x33	1x0.18	0.025	0.18	676
34	1x34	1x0.16	0.020	0.16	844
34	7x42	7x0.06	0.022	0.21	760
35	1x35	1x0.14	0.016	0.14	1120
36	1x36	1x0.13	0.013	0.13	1300
37	1x37	1x0.11	0.0095	0.11	1810
38	1x38	1x0.10	0.0078	0.10	2190
39	1x39	1x0.09	0.0064	0.09	2700
40	1x40	1x0.08	0.0050	0.08	3420
41	1x41	1x0.07	0.0039	0.07	4460
42	1x42	1x0.06	0.0028	0.06	6070
44	1x44	1x0.05	0.0020	0.06	8750
46	1x46	1x0.04	0.0013	0.06	13700