Calibration Resources

Sheetmetal Gage Conversion Chart

Gage No.	Steel	Stainless Steel	Aluminum
7	.179	-	-
8	.164	.172	-
9	.150	.156	-
10	.135	.141	-
11	.120	.125	-
12	.105	.109	-
13	.090	.094	.072
14	.075	.078	.064
15	.067	.070	.057
16	.060	.063	.051
17	.054	.056	.045
18	.048	.050	.040
19	.042	.044	.036
20	.036	.038	.032
21	.033	.034	.028
22	.030	.031	.025
23	.027	.028	.023
24	.024	.025	.020
25	.021	.022	.018
26	.018	.019	.017
27	.016	.017	.014
28	.015	.016	-
29	.014	.014	-
30	.012	.013	-
31	-	.011	-