gauge to mm

Questions and answers on how to convert things from one unit or system to another


gauge to mm

Postby guest » Fri May 20, 2005 7:05 pm

Hi all,

Any help would be good!

American measurement is in 'gauge' and British/european is in 'metric'

i.e. 20-gauge = (0.8mm) for measuring gold/silver wire!

anybody know where I might find a full conversion table?


Postby Guest » Fri May 20, 2005 8:22 pm

There are numerous "gauge" standards. It sounds like the one you want is American Wire Gauge (AWG), also known as Browne and Sharpe (not to be confused with Birmingham or Stubbs). It is commonly used for all non-ferrous wire. If you Google, you should be able to find versions in either metric or inch units.

However, you can compute it, too. It is a exponential progression, a ratio of 92:1 in 39 steps. 36 AWG has a diameter of 0.005", and 0000 AWG (which we'll call -3) has a diameter of 0.46" Any other gauge can be expressed as
d = 0.005 in x 92^((36-AWG)/39)
in mm, the 0.005" can be replaced by 0.127 mm, so
d = 0.127 mm x 92^((36-AWG)/39)

Note that AWG is never used for ferrous (iron or steel) wire or for sheet metal.

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