Wire Gauge to Inches and Millimeters Conversion Chart

Conveniently determine the diameter, in inches or millimeters, of wire gauges from 10 to 38 gauge.

Gauge	Inches	Millimeters
10	0.102	2.59	Shop 10 Gauge Wire
11	0.091	2.31
12	0.081	2.06	Shop 12 Gauge Wire
13	0.072	1.83	Shop 13 Gauge Wire
14	0.064	1.63	Shop 14 Gauge Wire
15	0.057	1.45
16	0.052	1.29	Shop 16 Gauge Wire
17	0.045	1.14
18	0.04	1.02	Shop 18 Gauge Wire
19	0.036	0.91	Shop 19 Gauge Wire
20	0.032	0.81	Shop 20 Gauge Wire
21	0.028	0.71	Shop 21 Gauge Wire
22	0.025	0.64	Shop 22 Gauge Wire
23	0.023	0.58
24	0.02	0.51	Shop 24 Gauge Wire
25	0.0179	0.455
26	0.0159	0.404	Shop 26 Gauge Wire
27	0.0142	0.361
28	0.0126	0.32	Shop 28 Gauge Wire
29	0.0113	0.287
30	0.01	0.25	Shop 30 Gauge Wire
31	0.0089	0.226
32	0.008	0.2	Shop 32 Gauge Wire
33	0.0071	0.18
34	0.0063	0.16	Shop 34 Gauge Wire
35	0.0056	0.142
36	0.005	0.13
37	0.0045	0.114
38	0.004	0.1

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