← Back to Dashboard

Sheet Metal Gauge Thickness Chart

Convert standard gauge numbers to actual thickness. Note that "Gauge" implies different thicknesses for different materials.

Gauge #	Standard Steel (inch)	Standard Steel (mm)	Galvanized (inch)	Galvanized (mm)	Stainless (inch)	Stainless (mm)	Aluminum (inch)	Aluminum (mm)
30	0.0120	0.30	0.0157	0.40	0.0125	0.32	0.0100	0.25
28	0.0149	0.38	0.0187	0.47	0.0156	0.40	0.0126	0.32
26	0.0179	0.45	0.0217	0.55	0.0187	0.48	0.0159	0.40
24	0.0239	0.61	0.0276	0.70	0.0250	0.64	0.0201	0.51
22	0.0299	0.76	0.0336	0.85	0.0312	0.79	0.0253	0.64
20	0.0359	0.91	0.0396	1.01	0.0375	0.95	0.0320	0.81
18	0.0478	1.21	0.0516	1.31	0.0500	1.27	0.0403	1.02
16	0.0598	1.52	0.0635	1.61	0.0625	1.59	0.0508	1.29
14	0.0747	1.90	0.0785	1.99	0.0781	1.98	0.0641	1.63
13	0.0897	2.28	0.0934	2.37	0.0937	2.38	0.0720	1.83
12	0.1046	2.66	0.1084	2.75	0.1094	2.78	0.0808	2.05
11	0.1196	3.04	0.1233	3.13	0.1250	3.18	0.0907	2.30
10	0.1345	3.42	0.1382	3.51	0.1406	3.57	0.1019	2.59
9	0.1495	3.80	0.1532	3.89	0.1562	3.97	0.1144	2.91
8	0.1644	4.18	0.1681	4.27	0.1719	4.37	0.1285	3.26
7	0.1793	4.55	-	-	0.1875	4.76	0.1443	3.67

Note: Gauge thickness varies by material. For example, 16 Gauge Steel (0.0598") is thicker than 16 Gauge Aluminum (0.0508"). Always verify with your supplier.