Size Sheet

Gauge (Ga.)	Standard Steel (inch)	Galvanized Steel (inch)	Stainless Steel (inch)	Aluminum (inch)	Standard Steel (mm)	Galvanized Steel (mm)	Stainless Steel (mm)	Aluminum (mm)
1			0.2813				7.145
2			0.2656				6.746
3	0.2391		0.2500	0.2294	6.07314		6.350
4	0.2242		0.2344	0.2043	5.69468		5.954
5	0.2092		0.2187	0.1819	5.31368		5.555
6	0.1943		0.2031	0.162	4.93522		5.159	4.1
7	0.1793		0.1875	0.1443	4.55422		4.763	3.67
8	0.1644		0.1719	0.1285	4.17576		4.366	3.26
9	0.1495	0.1532	0.1562	0.1144	3.7973	3.89128	3.967	2.91
10	0.1345	0.1382	0.1406	0.1019	3.4163	3.51028	3.571	2.59
11	0.1196	0.1233	0.1250	0.0907	3.03784	3.13182	3.175	2.30
12	0.1046	0.1084	0.1094	0.0808	2.65684	2.75336	2.779	2.05
13	0.0897	0.0934	0.0937	0.072	2.27838	2.37236	2.380	1.8
14	0.0747	0.0785	0.0781	0.0641	1.89738	1.9939	1.984	1.63
15	0.0673	0.071	0.0703	0.0571	1.70942	1.8034	1.786	1.4
16	0.0598	0.0635	0.0625	0.0508	1.51892	1.6129	1.588	1.29
17	0.0538	0.0575	0.0562	0.0453	1.36652	1.4605	1.427	1.1
18	0.0478	0.0516	0.0500	0.0403	1.21412	1.31064	1.270	1.02
19	0.0418	0.0456	0.0437	0.0359	1.06172	1.15824	1.110	0.91
20	0.0359	0.0396	0.0375	0.0320	0.91186	1.00584	0.953	0.81
21	0.0329	0.0366	0.0344	0.0285	0.83566	0.92964	0.874	0.71
22	0.0299	0.0336	0.0312	0.0253	0.75946	0.85344	0.792	0.64
23	0.0269	0.0306	0.0281	0.0226	0.68326	0.77724	0.714	0.58
24	0.0239	0.0276	0.0250	0.0201	0.60706	0.7004	0.635	0.51
25	0.0209	0.0247	0.0219	0.0179	0.53086	0.62738	0.556	0.46
26	0.0179	0.0217	0.0187	0.0159	0.45466	0.55118	0.475	0.40
27	0.0164	0.0202	0.0172	0.0142	0.41656	0.51308	0.437	0.36
28	0.0149	0.0187	0.0156	0.0126	0.37846	0.47498	0.396	0.32
29	0.035	0.0172	0.0141	0.0113	0.3429	0.43688	0.358	0.29
30	0.012	0.0157	0.0125	0.0100	0.3048	0.39878	0.318	0.25
31	0.0105	0.0142	0.0109		0.2667	0.36068	0.277
32	0.0097	0.0134	0.0102		0.24638	0.34036	0.259
33	0.009		0.0094		0.2286		0.239
34	0.0082		0.0086		0.20828		0.218
35	0.0075		0.0078		0.1905		0.198
36	0.0067		0.0070		0.17018		0.178
37	0.0064		0.0066		0.163		0.168
38	0.0060		0.0062		0.152		0.157

FAQ about Gauge Conversion

For different materials of steel, the same gauge will also correspond to different mm.

How many mm is 8 gauge?

Standard Steel: 8 Gauge = 4.176 mm
Stainless Steel: 8 Gauge = 4.191 mm
Aluminum, Brass, Copper: 8 Gauge = 4.115 mm

What is 16 gauge in mm?

Standard Steel: 16 Gauge = 1.519 mm
Galvanized Steel: 16 Gauge = 1.613 mm
Stainless Steel: 16 Gauge = 1.588 mm
Aluminum, Brass, Copper: 16 Gauge = 1.29 mm

What is 26 gauge thickness in mm?

Standard Steel: 26 Gauge = 0.456 mm
Galvanized Steel: 26 Gauge = 0.551 mm
Stainless Steel: 26 Gauge = 0.475 mm
Aluminum, Brass, Copper: 26 Gauge = 0.40 mm