AWG Wire Chart

American Wire Gauge: conductor diameter, cross-section area and copper resistance (from the AWG formula), with a free-air ampacity estimate.

AWG	Dia (mm)	Area (mm²)	Ω/km (Cu)	Ampacity (A)
4/0	11.684	107.219	0.16	380
3/0	10.405	85.029	0.20	328
2/0	9.266	67.431	0.26	283
1/0	8.251	53.475	0.32	245
1	7.348	42.408	0.41	211
2	6.544	33.631	0.51	181
3	5.827	26.670	0.65	—
4	5.189	21.151	0.82	135
5	4.621	16.773	1.03	—
6	4.115	13.302	1.30	101
7	3.665	10.549	1.63	—
8	3.264	8.366	2.06	73
9	2.906	6.634	2.60	—
10	2.588	5.261	3.28	55
11	2.305	4.172	4.13	—
12	2.053	3.309	5.21	41
13	1.828	2.624	6.57	—
14	1.628	2.081	8.29	32
15	1.450	1.650	10.45	—
16	1.291	1.309	13.17	22
17	1.150	1.038	16.61	—
18	1.024	0.823	20.95	16
19	0.912	0.653	26.41	—
20	0.812	0.518	33.31	11
21	0.723	0.410	42.00	—
22	0.644	0.326	52.96	7
23	0.573	0.258	66.78	—
24	0.511	0.205	84.21	3.5
25	0.455	0.162	106.19	—
26	0.405	0.129	133.90	2.2
27	0.361	0.102	168.85	—
28	0.321	0.081	212.92	1.4
29	0.286	0.064	268.48	—
30	0.255	0.051	338.55	0.86
31	0.227	0.040	426.90	—
32	0.202	0.032	538.32	—
33	0.180	0.025	678.80	—
34	0.160	0.020	855.96	—
35	0.143	0.016	1079.34	—
36	0.127	0.013	1361.02	—
37	0.113	0.010	1716.22	—
38	0.101	0.008	2164.11	—
39	0.090	0.006	2728.89	—
40	0.080	0.005	3441.07	—

Ampacity is a free-air estimate — derate for installed wiring. Interactive: AWG tool.

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