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Sometimes you need to convert SWG (Standard Wire Gauge) to mm (milimeter) unit. Specially when you read American Amateur Radio magazines and papers, you will find all the wires diameters in SWG unit. For converting SWG to mm, you can use two tables below:

Most Used Values

SWG mm Approximate SWG mm Approximate
10 3.25 23 0.6
12 2.64 24 0.55
14 2.03 25 0.5
16 1.62 26 0.45
18 1.2 27 0.4
20 0.9 30 0.3
22 0.7    

Complete List

SWG Dia(mm) SWG Dia(mm) SWG Dia(mm) SWG Dia(mm)
1 7.6200 14 2.0320 27 0.4166 40 0.1219
2 7.0104 15 1.8288 28 0.3759 41 0.1118
3 6.4008 16 1.6256 29 0.3454 42 0.1016
4 5.8928 17 1.4224 30 0.3150 43 0.0914
5 5.3848 18 1.2192 31 0.2946 44 0.0813
6 4.8768 19 1.0160 32 0.2743 45 0.0711
7 4.4704 20 0.9144 33 0.2540 46 0.0610
8 4.0640 21 0.8128 34 0.2337 47 0.0580
9 3.6576 22 0.7112 35 0.2134 48 0.0406
10 3.2512 23 0.6096 36 0.1930 49 0.0305
11 2.9464 24 0.5588 37 0.1727 50 0.0254
12 2.6416 25 0.5080 38 0.1524    
13 2.2368 26 0.4572 39 0.1321    
 
 

 


 

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