Table 1.

Measurements in Millimeters of the Three Major Gauge Size Systems (American, British, and Standard)

Gauge	AWG	BWG	SWG
21	0.72390	0.78740	0.81280
22	0.64262	0.71120	0.71120
23	0. 57404	0.63500	0. 60960
24	0.51054	0.58420	0.55880
25	0.45466	0.50800	0.50800
26	0.40386	0.45720	0.45720
27	0.36068	0.40640	0.41656
28	0.32004	0.34290	0.37592
29	0.28702	0.33020	0.34544
30	0.25400	0.30480	0.31496
31	0.22606	0.25400	0.29464
32	0.20320	0.22860	0.27432
33	0.18034	0.20320	0.25400
34	0.16002	0.17780	0.23368
35	0.14224	0.12700	0.21336
36	0.12700	0.10160	0.19304

AWG, American wire gauge; BWG, British wire gauge; SWG, Standard wire gauge.