SWG to decimal inches & millimetres

S.W.G.	Inches	mm	S.W.G.	Inches	mm
7/0	.500	12.70	23	.024	.61
6/0	.464	11.79	24	.022	.56
5/0	.432	10.97	25	.020	.51
4/0	.400	10.16	26	.018	.46
3/0	.372	9.45	27	.0164	.42
2/0	.348	8.84	28	.0148	.38
0	.324	8.23	29	.0136	.35
1	.300	7.62	30	.0124	.31
2	.276	7.01	31	.0116	.29
3	.252	6 .40	32	.0108	.27
4	.232	5.89	33	.010	.25
5	.219	5.38	34	.0092	.23
6	.192	4.88	35	.0084	.21
7	.176	4.47	36	.0076	.19
8	.160	4.06	37	.0068	.17
9	.144	3.66	38	.006	.15
10	.128	3.25	39	.0052	.13
11	.116	2.95	40	.0048	.12
12	.104	2.64	41	.0044	.11
13	.092	2.34	42	.004	.10
14	.080	2.03	43	.0036	.09
15	.072	1.83	44	.0032	.08
16	.064	1 .63	45	.0028	.07
17	.056	1.42	46	.0024	.06
18	.048	1.22	47	.002	.05
19	.040	1.02	48	.0016	.04
20	.036	0.91	49	.0012	.03
21	.032	0.81	50	.001	.025
22	.028	0.71