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Wire Gauge Measurements

WigJig Gauge conversion info

Wire Gauge Measurements



Wire Gauge Measurements are common to the USA and can be confusing if you are used to working in millimetres

Here are a list of gauge sizes with their approximate diameter in millimetres

This is intended for guidance only - the measurements are approximate and should be used as such.

The golden rule to remember is the higher the number of the wire Gauge, the thinner the wire will be - hence 28 gauge is much thinner that 14 gauge.

28 Gauge = 0.321mm
27 Gauge = 0.361mm
26 Gauge = 0.404mm
25 Gauge = 0.455mm
24 Gauge = 0.511mm
23 Gauge = 0.574mm
22 Gauge = 0.643mm
21 Gauge = 0.724mm
20 Gauge = 0.813mm
19 Gauge = 0.912mm
18 Gauge = 1.02mm

I buy my wire -in the most part, from a UK Manufacturer - and will liken each product to its smallest gauge for the sizing - for example, I have 0.3mm and am not aware if it is 0.321 or 0.361mm, and so would liken that to 28 Gauge - the sizing for 0.321mm width.

Therefore, using my system :
0.3mm = 28 gauge
0.4mm = 26 gauge
0.5mm = 24 gauge
0.6mm = 22 gauge
0.7mm = 21 gauge
0.8mm = 20 gauge
0.9mm = 19 gauge
1.0mm = 18 gauge.