How to convert gauge thickness to mm

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How to convert gauge thickness to mm

 
GAUGE SIZE CHART- PIPE/TUBE
                   
There are several standards for pipe/tube gauge thickness. Usually stainelss steel pipes adapt to B.W.G..
                   
SWG: British Imperial Standard Wire Gauge Size        
BWG: Birmingham Wire Gauge Size            
B&S: Brown and Sharpe Wire Gauge Size          
A.S.W.G: American Standard Wire Gauge Size: W.& M.        
J de P: Paris Wire Gauge Size            
WG: Westphalia Wire Gauge Size            
BG: Standard Birmingham Sheet and Hoop Gauge Size        
USS: Standard for Sheet and Plate Iron and Steel Gauge Size      
                   
Gauge Size S.W.G. B.W.G. B.＆ S. A.S. A.S. J.de P. W.G. B.G. U.S.S.
No. mm mm mm W.G. W.G. mm mm mm mm
　 　 　 　 mm inch 　 　 　 　
0 12.699 　 　 12.45 0.49 　 　 　 12.7
0 11.785 　 14.73 11.72 0.4615 (PI)100 0.6 　 11.906
0 10.972 12.7 13.12 10.93 0.4305 (P)500 0.68 12.7 11.113
0 10.159 11.532 11.68 10 0.3938 600 0.76 11.303 10.319
0 9.449 10.795 10.4 9.208 0.3625 700 0.8 10.069 9.525
0 8.839 9.652 9.266 8.407 0.331 800 0.88 8.971 8.732
0 8.23 8.636 8.255 7.785 0.3065 900 1 7.993 7.938
1 7.62 7.62 7.348 7.188 0.283 1 1.12 7.122 7.144
2 7.01 7.213 6.543 6.688 0.2625 1.1 1.2 6.35 6.747
3 6.401 6.579 5.827 6.19 0.2437 1.2 1.3 5.652 6.35
4 5.893 6.045 5.189 5.723 0.2253 1.3 1.4 5.032 5.953
5 5.385 5.588 4.62 5.258 0.207 1.4 1.56 4.481 5.556
6 4.877 5.156 4.115 4.877 0.192 1.5 1.66 3.988 5.159
7 4.47 4.572 3.665 4.496 0.177 1.6 1.84 3.551 4.763
8 4.064 4.191 3.264 4.115 0.162 1.8 2.04 3.175 4.366
9 3.658 3.759 2.906 3.767 0.1483 2 2.2 2.827 3.969
10 3.251 3.404 2.588 3.429 0.135 2.2 2.4 2.517 9.572
11 2.946 3.048 2.304 3.061 0.1205 2.4 2.6 2.24 2.175
12 2.642 2.769 2.052 2.68 0.1055 2.7 3.92 1.994 2.778
13 2.337 2.413 1.826 2.324 0.0915 3 3.4 1.775 2.381
14 2.032 2.108 1.628 2.032 0.08 3.4 3.84 1.588 1.984
15 1.829 1.829 1.45 1.829 0.072 3.9 4.2 1.412 1.786
16 1.626 1.651 1.29 1.583 0.0625 4.4 4.65 1.257 1.588
17 1.422 1.473 1.151 1.372 0.054 4.9 5.45 1.118 1.429
18 1.219 1.245 1.024 1.207 0.0475 5.4 5.96 0.9956 1.27
19 1.016 1.067 0.9116 1.041 0.041 5.9 7 0.8865 1.111
20 0.9144 0.8884 0.8128 0.8839 0.0348 6.4 7.6 0.7938 0.9525
21 0.8128 0.8128 0.7239 0.8052 0.0318 7 8.8 0.7077 0.8731
22 0.7112 0.7109 0.6426 0.7264 0.0286 7.6 9.4 0.6289 0.7938
23 0.6096 0.6347 0.574 0.6553 0.0258 8.2 10 0.5598 0.7114
24 0.5588 0.5585 0.5105 0.5862 0.023 8.8 　 0.4981 0.635
25 0.508 0.5078 0.4547 0.5182 0.0204 9.4 　 0.4432 0.5556
26 0.457 0.457 0.4039 0.4597 0.0181 10 　 0.3969 0.4763
27 0.417 0.4062 0.3607 0.4394 0.0173 　 　 0.3531 0.4366
28 0.376 0.3555 0.32 0.4115 0.0162 　 　 0.3124 0.3969
29 0.345 0.33 0.2875 0.381 0.015 　 　 0.2794 0.3572
30 0.315 0.305 0.254 0.3556 0.014 　 　 0.2489 0.3175
31 0.295 0.2539 0.2268 0.3353 0.0132 　 　 0.221 0.2778
32 0.274 0.2286 0.2019 0.3251 0.0122 　 　 0.1956 0.258
33 0.254 0.2031 0.1798 0.2997 0.0118 　 　 0.1753 0.2381
34 0.234 0.1777 0.16 0.2642 0.0104 　 　 0.1579 0.2183
35 0.213 0.1269 0.1425 0.2413 0.1195 　 　 0.1372 0.1984
36 0.193 0.102 0.127 0.2286 0.009 　 　 0.1219 0.1786
37 0.172 　 0.1112 0.2159 0.0085 　 　 　 0.1687
38 0.152 　 0.1006 0.2032 0.008 　 　 　 0.1588
39 0.132 　 0.0897 0.1905 0.0075 　 　 　 　
40 0.122 　 0.0897 0.1778 0.007 　 　 　 　

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