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Steel Thickness Conversion Table (Inch / mm)

Posted on November 20 2019

Gauge No.
B.W.G. U.S.G.
inch mm inch mm
6 0.203 5.156 0.2031 5.16
7 0.18 4.572 0.1875 4.76
8 0.165 4.191 0.1719 4.37
9 0.148 3.759 0.1563 3.97
10 0.134 3.404 0.1406 3.57
11 0.12 3.048 0.125 3.18
12 0.109 2.769 0.1094 2.78
13 0.095 2.413 0.0938 2.38
14 0.083 2.108 0.0781 1.98
15 0.072 1.829 0.0703 1.79
16 0.065 1.651 0.0625 1.59
17 0.058 1.473 0.0563 1.43
18 0.049 1.245 0.05 1.27
19 0.042 1.067 0.0438 1.11
20 0.035 0.889 0.0375 0.953
21 0.032 0.813 0.0344 0.873
22 0.028 0.711 0.0313 0.794
23 0.025 0.635 0.0281 0.714
24 0.022 0.559 0.025 0.635
25 0.02 0.508 0.0219 0.556
26 0.018 0.457 0.0188 0.478
27 0.016 0.406 0.0172 0.437
28 0.014 0.356 0.0156 0.396
29 0.013 0.33 0.0141 0.358
30 0.012 0.305 0.0125 0.318
31 0.01 0.254 0.0109 0.277
32 0.009 0.229 0.0102 0.259
33 0.008 0.203 0.0094 0.239
34 0.007 0.178 0.0086 0.218
35 0.005 0.127 0.0078 0.198

 

BWG - Birmingham Wire Gauge

USG - US Standard Gauge

 

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