Wire gauge is commonly referred to as "wire size", "wire diameter" and is even at times spelt as "wire gage". There is a helpful Wire Size Conversion table below. However the wire conversions (wherever you find it), will be at best, only a good approximation because there is no global, consistent standard for these wire size conversions.
Wire gauges can be especially confusing to beginners because it is perversely counter-intuitive. While there is no global standard, one rule holds true:
There are a few main Gauge Rating systems:
For our purposes, and the two most well known rating systems are AWG and SWG. Hence our conversion table will take these 2 rating systems into account.
For example, if you are buying a wire which you are told to be 20 ga (gauge), you can see from the wire conversion table below that:
20 awg = 0.813 mm but
20 swg = 0.914 mm
Same gauge number but not the same size at all! Most of the time, this slight differential might not be very important to your project but it is something to keep in mind if you require high precision for your wire sizing.
|Gauge Size||Ø in inches||Ø in mm||Ø in inches||Ø in mm|
|32||same thickness as general sewing thread|
There are quite a few useful tools you can get to easily help determiine the size (diameter) of your wires. They come in a number of materials from plastic to steel. They may also measure both wire diameters and thicknss of metal sheets - which would be extra handy.
Things to keep in mind when shopping for a wire gauge measurement tool: