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Standard Wire Gauge

A numbering system for standard wire diameters, often abbreviated as SWG.

SWG gauge no.	Diameter Inches	Diameter mm
7/0	0.500	12.7
6/0	0.464	11.786
5/0	0.432	10.973
4/0	0.400	10.160
3/0	0.372	9.449
2/0	0.348	8.839
0	0.324	8.230
1	0.300	7.620
2	0.276	7.010
3	0.252	6.401
4	0.232	5.893
5	0.212	5.385
6	0.192	4.877
7	0.176	4.470
8	0.160	4.064
9	0.144	3.658
10	0.128	3.251
11	0.116	2.946
12	0.104	2.642
13	0.092	2.337
14	0.080	2.032
15	0.072	1.8288
16	0.064	1.6256
17	0.056	1.4224
18	0.048	1.2192
19	0.040	1.0160
20	0.036	0.9144
21	0.032	0.8128
22	0.028	0.7112
23	0.024	0.6096
24	0.022	0.5588
25	0.020	0.5080
26	0.018	0.4572
27	0.0164	0.4166
28	0.0148	0.3759
29	0.0136	0.3454
30	0.0124	0.3150
31	0.0116	0.2946
32	0.0108	0.2743
33	0.0100	0.2540
34	0.0092	0.2337
35	0.0084	0.2134
36	0.0076	0.1930
37	0.0068	0.1727
38	0.0060	0.1524
39	0.0052	0.1321
40	0.0048	0.1219
41	0.0044	0.1118
42	0.0040	0.1016
43	0.0036	0.0914
44	0.0032	0.0813
45	0.0028	0.0711
46	0.0024	0.0610
47	0.0020	0.0508
48	0.0016	0.0406
49	0.0012	0.0305
50	0.0010	0.0254

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