SWG standard wire gauge table (British, BS 3737): 7/0 to 50, diameter in inches and mm — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/swg-standard-wire-gauge-table/ (sheet CC BY 4.0) Basis: Wikipedia's Standard wire gauge table (BS 3737:1964, withdrawn), cross-checked on Engineering ToolBox; numbers only Catalog version: 2026-10-20 Sizes: see table below - Standard (Imperial) wire gauge, also called the British Standard Gauge, from the table on Wikipedia, which cites BS 3737:1964 (withdrawn; the current British standard for metallic materials is BS 6722:1986). Cross-checked against the Engineering ToolBox SWG table: all inch values are the same and all mm values agree to rounding, with one disagreement: for gauge 0 (written 1/0 on the Engineering ToolBox) Wikipedia prints 8.230 mm, Engineering ToolBox 8.236 mm. 0.324 in × 25.4 is 8.2296 mm, so the Wikipedia number is shown and the other is not used. - SWG is not AWG: 10 SWG is 0.128 in, 10 AWG is 0.1019 in (see the AWG page). SWG is used for wire in the UK, for some sheet and for wire gauges quoted on jewellery and musical wire in British catalogues; sheet metal gauge numbers are a third, different series (see the sheet gauge page). - Diameters only: no area, mass or resistance is on the sources read for SWG, so none is shown. No files: a wire is a plain cylinder. SWG diameter (in) diameter (mm) 7/0 0.500 12.700 6/0 0.464 11.786 5/0 0.432 10.973 4/0 0.400 10.160 3/0 0.372 9.449 2/0 0.348 8.839 0 (also written 1/0) 0.324 8.230 1 0.300 7.620 2 0.276 7.010 3 0.252 6.401 4 0.232 5.893 5 0.212 5.385 6 0.192 4.877 7 0.176 4.470 8 0.160 4.064 9 0.144 3.658 10 0.128 3.251 11 0.116 2.946 12 0.104 2.642 13 0.092 2.337 14 0.080 2.032 15 0.072 1.829 16 0.064 1.626 17 0.056 1.422 18 0.048 1.219 19 0.040 1.016 20 0.036 0.914 21 0.032 0.813 22 0.028 0.711 23 0.024 0.610 24 0.022 0.559 25 0.020 0.5080 26 0.018 0.4572 27 0.0164 0.4166 28 0.0148 0.3759 29 0.0136 0.3454 30 0.0124 0.3150 31 0.0116 0.2946 32 0.0108 0.2743 33 0.0100 0.2540 34 0.0092 0.2337 35 0.0084 0.2134 36 0.0076 0.1930 37 0.0068 0.1727 38 0.0060 0.1524 39 0.0052 0.1321 40 0.0048 0.1219 41 0.0044 0.1118 42 0.0040 0.1016 43 0.0036 0.0914 44 0.0032 0.0813 45 0.0028 0.0711 46 0.0024 0.0610 47 0.0020 0.0508 48 0.0016 0.0406 49 0.0012 0.0305 50 0.0010 0.0254 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Wikipedia: Standard wire gauge: SWG 7/0 to 50 in inches and mm (BS 3737:1964, withdrawn) — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Standard_wire_gauge - Engineering ToolBox: SWG - Standard Wire Gauge: the same table, used as a cross-check — web — Publisher's page; dimensions are facts — https://engineeringtoolbox.com/swg-standard-wire-gauge-d_1779.html No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=swg-standard-wire-gauge-table