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