## How Many? A Dictionary of Units of Measurement © Russ Rowlett and the University of North Carolina at Chapel Hill Table of Contents About the Dictionary Using the Dictionary American and British Wire Gauges

Data originally posted by Enginering Zones.

 Gauge Washburn  & Moen British Imperial Standard (S.W.G.) Birmingham or Stubs American (A.W.G.) or Brown & Sharpe 7/0 .4900" .500" --- --- 6/0 .4615" .464" --- .5800" 5/0 .4305" .432" .500" .5165" 4/0 .3938" .400" .454" .4600" 3/0 .3625" .372" .425" .4096" 2/0 .3310" .348" .380" .3648" 1/0 .3065" .324" .340" .3249" 1 .2830" .300" .300" .2893" 2 .2625" .276" .284" .2576" 3 .2437" .252" .259" .2294" 4 .2253" .232" .238" .2043" 5 .2070" .212" .220" .1819" 6 .1920" .192" .203" .1620" 7 .1770" .176" .180" .1442" 8 .1620" .160" .165" .1284" 9 .1483" .144" .148" .1144" 10 .1350" .128" .134" .1018" 11 .1205" .116" .120" .0907" 12 .1055" .104" .109" .0808" 13 .0915" .092" .095" .0719" 14 .0800" .080" .083" .0640" 15 .0720" .072" .072" .0570" 16 .0625" .064" .065" .0508" 17 .0540" .056" .058" .0452" 18 .0475" .048" .049" .0403" 19 .0410" .040" .042" .0358" 20 .0348" .036" .035" .0319" Gauge Number Washburn  & Moen British Imperial Standard (S.W.G.) Birmingham or Stubs American (A.W.G.) or Brown & Sharpe 21 .0317" .032" .032" .0284" 22 .0286" .028" .028" .0253" 23 .0258" .024" .025" .0225" 24 .0230" .022" .022" .0201" 25 .0204" .020" .020" .0179" 26 .0181" .018" .018" .0159" 27 .0173" .0164" .016" .0141" 28 .0162" .0148" .014" .0126" 29 .0150" .0136" .013" .0112" 30 .0140" .0124" .012" .0100" 31 .0132" .0116" .010" .0089" 32 .0128" .0108" .009" .0079" 33 .0118" .0100" .008" .0070" 34 .0104" .0092" .007" .0063" 35 .0095" .0084" .005" .0056" 36 .0090" .0076" .004" .0050" 37 .0085" .0068" --- .0044" 38 .0080" .0060" --- .0039" 39 .0075" .0052" --- .0035" 40 .0070" .0048" --- .0031" 41 .0066" .0044" --- .00280" 42 .0062" .0040" --- .00249" 43 .0060" .0036" --- .00222" 44 .0058" .0032" --- .00198" 45 .0055" .0028" -- .00176" 46 .0052" .0024" --- .00157" 47 .0050" .0020" --- .00140" 48 .0048" .0016" --- .00124" 49 .0046" .0012" -- .00111" 50 .0044" .0010" -- .00099"