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Wire gauge conversion formulae



Original poster: "Wall Richard Wayne by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>

I found these interesting formulae on the web. 
 

d(inches) = 0.32/2^(G/6)

This formula converts "G" in AWG to inches.  For example, 30 AWG 
gives

0.32/2^(30/6) = 0.32/2^5 = 0.01"

To convert AWG to metric:

d(mm) = 8.128/2^(G/6)
RWW