Dr. Know| Gauge Number | Metric System [mm] | Gauge Number | Imperial System [inch] | ||||||
|---|---|---|---|---|---|---|---|---|---|
| British Imperial Standard (S.W.G.) |
Birmingham/ Stubs |
Washburn & Moen | American/ Brown & Sharp |
British Imperial Standard (S.W.G.) |
Birmingham/ Stubs |
Washburn & Moen | American/ Brown & Sharp |
||
| Common in Europe | Common in the US | Common in Europe | Common in the US | ||||||
| 7/0 | 12.7000 | 12.4460 | 7/0 | 0.500" | 0.4900" | ||||
| 6/0 | 11.7856 | 11.7221 | 14.7320 | 6/0 | 0.464" | 0.4615" | 0.5800" | ||
| 5/0 | 10.9728 | 12.7000 | 10.9347 | 13.1191 | 5/0 | 0.432" | 0.500" | 0.4305" | 0.5165" |
| 4/0 | 10.1600 | 11.5316 | 10.0025 | 11.6840 | 4/0 | 0.400" | 0.454" | 0.3938" | 0.4600" |
| 3/0 | 9.4488 | 10.7950 | 9.2075 | 10.4038 | 3/0 | 0.372" | 0.425" | 0.3625" | 0.4096" |
| 2/0 | 8.8392 | 9.6520 | 8.4074 | 9.2659 | 2/0 | 0.348" | 0.380" | 0.3310" | 0.3648" |
| 1/0 | 8.2296 | 8.6360 | 7.7851 | 8.2525 | 1/0 | 0.324" | 0.340" | 0.3065" | 0.3249" |
| 1 | 7.6200 | 7.6200 | 7.1882 | 7.3482 | 1 | 0.300" | 0.300" | 0.2830" | 0.2893" |
| 2 | 7.0104 | 7.2136 | 6.6675 | 6.5430 | 2 | 0.276" | 0.284" | 0.2625" | 0.2576" |
| 3 | 6.4008 | 6.5786 | 6.1900 | 5.8268 | 3 | 0.252" | 0.259" | 0.2437" | 0.2294" |
| 4 | 5.8928 | 6.0452 | 5.7226 | 5.1892 | 4 | 0.232" | 0.238" | 0.2253" | 0.2043" |
| 5 | 5.3848 | 5.5880 | 5.2578 | 4.6203 | 5 | 0.212" | 0.220" | 0.2070" | 0.1819" |
| 6 | 4.8768 | 5.1562 | 4.8768 | 4.1148 | 6 | 0.192" | 0.203" | 0.1920" | 0.1620" |
| 7 | 4.4704 | 4.5720 | 4.4958 | 3.6627 | 7 | 0.176" | 0.180" | 0.1770" | 0.1442" |
| 8 | 4.0640 | 4.1910 | 4.1148 | 3.2614 | 8 | 0.160" | 0.165" | 0.1620" | 0.1284" |
| 9 | 3.6576 | 3.7592 | 3.7668 | 2.9058 | 9 | 0.144" | 0.148" | 0.1483" | 0.1144" |
| 10 | 3.2512 | 3.4036 | 3.4290 | 2.5857 | 10 | 0.128" | 0.134" | 0.1350" | 0.1018" |
| 11 | 2.9464 | 3.0480 | 3.0607 | 2.3038 | 11 | 0.116" | 0.120" | 0.1205" | 0.0907" |
| 12 | 2.6416 | 2.7686 | 2.6797 | 2.0523 | 12 | 0.104" | 0.109" | 0.1055" | 0.0808" |
| 13 | 2.3368 | 2.4130 | 2.3241 | 1.8263 | 13 | 0.092" | 0.095" | 0.0915" | 0.0719" |
| 14 | 2.0320 | 2.1082 | 2.0320 | 1.6256 | 14 | 0.080" | 0.083" | 0.0800" | 0.0640" |
| 15 | 1.8288 | 1.8288 | 1.8288 | 1.4478 | 15 | 0.072" | 0.072" | 0.0720" | 0.0570" |
| 16 | 1.6256 | 1.6510 | 1.5875 | 1.2903 | 16 | 0.064" | 0.065" | 0.0625" | 0.0508" |
| 17 | 1.4224 | 1.4732 | 1.3716 | 1.1481 | 17 | 0.056" | 0.058" | 0.0540" | 0.0452" |
| 18 | 1.2192 | 1.2446 | 1.2065 | 1.0236 | 18 | 0.048" | 0.049" | 0.0475" | 0.0403" |
| 19 | 1.0160 | 1.0668 | 1.0414 | 0.9093 | 19 | 0.040" | 0.042" | 0.0410" | 0.0358" |
| 20 | 0.9144 | 0.8890 | 0.8839 | 0.8103 | 20 | 0.036" | 0.035" | 0.0348" | 0.0319" |
| 21 | 0.8128 | 0.8128 | 0.8052 | 0.7214 | 21 | 0.032" | 0.032" | 0.0317" | 0.0284" |
| 22 | 0.7112 | 0.7112 | 0.7264 | 0.6426 | 22 | 0.028" | 0.028" | 0.0286" | 0.0253" |
| 23 | 0.6096 | 0.6350 | 0.6553 | 0.5715 | 23 | 0.024" | 0.025" | 0.0258" | 0.0225" |
| 24 | 0.5588 | 0.5588 | 0.5842 | 0.5105 | 24 | 0.022" | 0.022" | 0.0230" | 0.0201" |
| 25 | 0.5080 | 0.5080 | 0.5182 | 0.4547 | 25 | 0.020" | 0.020" | 0.0204" | 0.0179" |
| 26 | 0.4572 | 0.4572 | 0.4597 | 0.4039 | 26 | 0.018" | 0.018" | 0.0181" | 0.0159" |
| 27 | 0.4166 | 0.4064 | 0.4394 | 0.3581 | 27 | 0.0164" | 0.016" | 0.0173" | 0.0141" |
| 28 | 0.3759 | 0.3556 | 0.4115 | 0.3200 | 28 | 0.0148" | 0.014" | 0.0162" | 0.0126" |
| 29 | 0.3454 | 0.3302 | 0.3810 | 0.2845 | 29 | 0.0136" | 0.013" | 0.0150" | 0.0112" |
| 30 | 0.3150 | 0.3048 | 0.3556 | 0.2540 | 30 | 0.0124" | 0.012" | 0.0140" | 0.0100" |
| 31 | 0.2946 | 0.2540 | 0.3353 | 0.2261 | 31 | 0.0116" | 0.010" | 0.0132" | 0.0089" |
| 32 | 0.2743 | 0.2286 | 0.3251 | 0.2007 | 32 | 0.0108" | 0.009" | 0.0128" | 0.0079" |
| 33 | 0.2540 | 0.2032 | 0.2997 | 0.1778 | 33 | 0.0100" | 0.008" | 0.0118" | 0.0070" |
| 34 | 0.2337 | 0.1778 | 0.2642 | 0.1600 | 34 | 0.0092" | 0.007" | 0.0104" | 0.0063" |
| 35 | 0.2134 | 0.1270 | 0.2413 | 0.1422 | 35 | 0.0084" | 0.005" | 0.0095" | 0.0056" |
| 36 | 0.1930 | 0.1016 | 0.2286 | 0.1270 | 36 | 0.0076" | 0.004" | 0.0090" | 0.0050" |
| 37 | 0.1727 | 0.2159 | 0.1118 | 37 | 0.0068" | 0.0085" | 0.0044" | ||
| 38 | 0.1524 | 0.2032 | 0.0991 | 38 | 0.0060" | 0.0080" | 0.0039" | ||
| 39 | 0.1321 | 0.1905 | 0.0889 | 39 | 0.0052" | 0.0075" | 0.0035" | ||
| 40 | 0.1219 | 0.1778 | 0.0787 | 40 | 0.0048" | 0.0070" | 0.0031" | ||
| 41 | 0.1118 | 0.1676 | 0.0711 | 41 | 0.0044" | 0.0066" | 0.00280" | ||
| 42 | 0.1016 | 0.1575 | 0.0632 | 42 | 0.0040" | 0.0062" | 0.00249" | ||
| 43 | 0.0914 | 0.1524 | 0.0564 | 43 | 0.0036" | 0.0060" | 0.00222" | ||
| 44 | 0.0813 | 0.1473 | 0.0503 | 44 | 0.0032" | 0.0058" | 0.00198" | ||
| 45 | 0.0711 | 0.1397 | 0.0447 | 45 | 0.0028" | 0.0055" | 0.00176" | ||
| 46 | 0.0610 | 0.1321 | 0.0399 | 46 | 0.0024" | 0.0052" | 0.00157" | ||
| 47 | 0.0508 | 0.1270 | 0.0356 | 47 | 0.0020" | 0.0050" | 0.00140" | ||
| 48 | 0.0406 | 0.1219 | 0.0315 | 48 | 0.0016" | 0.0048" | 0.00124" | ||
| 49 | 0.0305 | 0.1168 | 0.0282 | 49 | 0.0012" | 0.0046" | 0.00111" | ||
| 50 | 0.0254 | 0.1118 | 0.0251 | 50 | 0.0010" | 0.0044" | 0.00099" | ||