Sheet Metal Gauge Sizes Chart In Inch and mm

In order to help you guys who specialized in metalworking industry to check sheet metal gauge thickness to inch and gauge thickness to mm, I collect the sheet metal gauge sizes conversion chart both in inch and mm to help you quickly find the sheet metal gauge thickness (including mild steel gauge thickness, aluminum gauge thickness, galvanized sheet gauge thickness, stainless steel gauge thickness), you can also find the mm to gauge conversion for sheet metal by the chart.

Therefore, there is no need to calculate by yourself according to the gauge to mm conversion formula. You can also download sheet metal gauge chart in pdf for your future reference.




Gauge Galv. Steel Stainless Steel
in/mm in mm in mm
3 – – 0.25 6.35
4 – – 0.2344 5.9538
5 – – 0.2187 5.555
6 – – 0.2031 5.1587
7 – – 0.1875 4.7625
8 0.168 4.2672 0.1719 4.3663
9 0.1532 3.8913 0.1562 3.9675
10 0.1382 3.5103 0.1406 3.5712
11 0.1233 3.1318 0.125 3.175
12 0.1084 2.7534 0.1094 2.7788
13 0.0934 2.3724 0.0937 2.38
14 0.0785 1.9939 0.0781 1.9837
15 0.071 1.8034 0.0703 1.7856
16 0.0635 1.6129 0.0625 1.5875
17 0.0575 1.4605 0.0562 1.4275
18 0.0516 1.3106 0.05 1.27
19 0.0456 1.1582 0.0437 1.11
20 0.0396 1.0058 0.0375 0.9525
21 0.0366 0.9296 0.0344 0.8738
22 0.0336 0.8534 0.0312 0.7925
23 0.0306 0.7772 0.0281 0.7137
24 0.0276 0.701 0.025 0.635
25 0.0247 0.6274 0.0219 0.5563
26 0.0217 0.5512 0.0187 0.475
27 0.0202 0.5131 0.0172 0.4369
28 0.0187 0.475 0.0156 0.3962
29 0.0172 0.4369 0.0141 0.3581
30 0.0157 0.3988 0.0125 0.3175
31 0.0142 0.3607 0.0109 0.2769
32 0.0134 0.3404 0.0102 0.2591
33 – – 0.0094 0.2388
34 – – 0.0086 0.2184
35 – – 0.0078 0.1981
36 – – 0.007 0.1778




Gauge Mild Steel Aluminum
in/mm in mm in mm
3 0.2391 6.0731 0.2294 5.8268
4 0.2242 5.6947 0.2043 5.1892
5 0.2092 5.3137 0.1819 4.6203
6 0.1943 4.9352 0.162 4.1148
7 0.1793 4.5542 0.1443 3.6652
8 0.1644 4.1758 0.1285 3.2639
9 0.1495 3.7973 0.1144 2.9058
10 0.1345 3.4163 0.1019 2.5883
11 0.1196 3.0378 0.0907 2.3038
12 0.1046 2.6568 0.0808 2.0523
13 0.0897 2.2784 0.072 1.8288
14 0.0747 1.8974 0.0641 1.6281
15 0.0673 1.7094 0.0571 1.4503
16 0.0598 1.5189 0.0508 1.2903
17 0.0538 1.3665 0.0453 1.1506
18 0.0478 1.2141 0.0403 1.0236
19 0.0418 1.0617 0.0359 0.9119
20 0.0359 0.9119 0.032 0.8128
21 0.0329 0.8357 0.0285 0.7239
22 0.0299 0.7595 0.0253 0.6426
23 0.0269 0.6833 0.0226 0.574
24 0.0239 0.6071 0.0201 0.5105
25 0.0209 0.5309 0.0179 0.4547
26 0.0179 0.4547 0.0159 0.4039
27 0.0164 0.4166 0.0142 0.3607
28 0.0149 0.3785 0.0126 0.32
29 0.0135 0.3429 0.0113 0.287
30 0.012 0.3048 0.01 0.254
31 0.0105 0.2667 0.0089 0.2261
32 0.0097 0.2464 0.008 0.2032
33 0.009 0.2286 0.0071 0.1803
34 0.0082 0.2083 0.0063 0.16
35 0.0075 0.1905 0.0056 0.1422
36 0.0067 0.1702 – –

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