Wire	Diameter	Diameter	Resistance	Resistance
Gauge	(Inches)	(mm)	Ω per 1000′	Ω per km
0000	0.4600	11.6840	0.05	0.16
000	0.4096	10.4038	0.06	0.20
00	0.3648	9.2659	0.08	0.26
0	0.3249	8.2525	0.10	0.32
1	0.2893	7.3482	0.12	0.41
2	0.2576	6.5430	0.16	0.51
3	0.2294	5.8268	0.20	0.65
4	0.2043	5.1892	0.25	0.82
5	0.1819	4.6203	0.31	1.03
6	0.1620	4.1148	0.40	1.30
7	0.1443	3.6652	0.50	1.63
8	0.1285	3.2639	0.63	2.06
9	0.1144	2.9058	0.79	2.60
10	0.1019	2.5883	1.00	3.28
11	0.0907	2.3038	1.26	4.13
12	0.0808	2.0523	1.59	5.21
13	0.0720	1.8288	2.00	6.57
14	0.0641	1.6281	2.53	8.28
15	0.0571	1.4503	3.18	10.44
16	0.0508	1.2903	4.02	13.17
17	0.0453	1.1506	5.06	16.61
18	0.0403	1.0236	6.39	20.94
19	0.0359	0.9119	8.05	26.41
20	0.0320	0.8128	10.15	33.29

Wire	Diameter	Diameter	Resistance	Resistance
Gauge	(Inches)	(mm)	Ω per 1000′	Ω per km
21	0.0285	0.7239	12.80	41.98
22	0.0254	0.6452	16.14	52.94
23	0.0226	0.5740	20.36	66.78
24	0.0201	0.5105	25.67	84.20
25	0.0179	0.4547	32.37	106.17
26	0.0159	0.4039	40.81	133.86
27	0.0142	0.3607	51.47	168.82
28	0.0126	0.3200	64.90	212.87
29	0.0113	0.2870	81.83	268.40
30	0.0100	0.2540	103.20	338.50
31	0.0089	0.2261	130.10	426.73
32	0.0080	0.2032	164.10	538.25
33	0.0071	0.1803	206.90	678.63
34	0.0063	0.1600	260.90	855.75
35	0.0056	0.1422	329.00	1,079.12
36	0.0050	0.1270	414.80	1,360.00
37	0.0045	0.1143	523.10	1,715.00
38	0.0040	0.1016	659.60	2,163.00
39	0.0035	0.0889	831.80	2,728.00
40	0.0031	0.0787	1,049.00	3,440.00