Wire Gauge Conversion Chart

(Legend below)
Wire Gauge Nr. AWG or B&S
(Inch, Electric)		 SWG (U.S.)
(Inch)		 SWG (British)
(inch)		 Piano Wire
0000000 (7/0) - 0.4900 0.500 -
000000 (6/0) 0.580000 0.4615 0.464 0.004
00000 (5/0) 0.516500 0.4305 0.432 0.005
0000 (4/0) 0.460000 0.3938 0.400 0.006
000 (3/0) 0.409642 0.3625 0.372 0.007
00 (2/0) 0.364796 0.3310 0.348 0.008
0 (1/0) 0.324861 0.3065 0.324 0.009
1 0.289297 0.2830 0.300 0.010
2 0.257627 0.2625 0.276 0.011
3 0.229423 0.2437 0.252 0.012
4 0.2043 0.2253 0.232 0.013
5 0.1819 0.2070 0.2120 0.014
6 0.1620 0.1920 0.1920 0.016
7 0.1443 0.1770 0.1760 0.018
8 0.1285 0.1620 0.1600 0.020
9 0.1144 0.1483 0.1440 0.022
10 0.1019 0.1350 0.1280 0.024
11 0.0907 0.1205 0.1160 0.026
12 0.0808 0.1055 0.1040 0.029
13 0.0720 0.0915 0.0920 0.031
14 0.0641 0.0800 0.0800 0.033
15 0.0571 0.0720 0.0720 0.035
16 0.0508 0.0625 0.0640 0.037
17 0.0453 0.0540 0.0560 0.039
18 0.0403 0.0475 0.0480 0.041
19 0.0359 0.0410 0.0400 0.043
20 0.0320 0.0348 0.0360 0.045
21 0.0285 0.0318 0.0320 0.047
22 0.0253 0.0286 0.0280 0.049
23 0.0226 0.0258 0.0240 0.051
24 0.0201 0.0230 0.0220 0.055
25 0.0179 0.0204 0.0200 0.059
26 0.0159 0.0181 0.0180 0.063
27 0.0142 0.0173 0.0164 0.067
28 0.0126 0.0162 0.0148 0.071
29 0.0113 0.0150 0.0136

0.075
30 0.0100 0.0140 0.0124 0.080
31 0.0089 0.0132 0.0116 0.085
32 0.0080 0.0128 0.0108 0.090
33 0.0071 0.0118 0.0100 0.095
34 0.0063 0.0104 0.0092 0.100
35 0.0056 0.0095 0.0084 0.106
36 0.0050 0.0090 0.0076 0.112
37 0.0045 0.0085 0.0068 0.118
38 0.0040 0.0080 0.0060 0.124
39 0.0035 0.0075 0.0052 0.130
40 0.0031 0.0070 0.0048 0.138
41 0.0028 0.0066 0.0044 0.146
42 0.0025 0.0062 0.0040 0.154
43 0.0022 0.0060 0.0036 0.162
44 0.0020 0.0058 0.0032 0.170
45 0.0018 0.0055 0.0028 0.180
46 0.0016 0.0052 0.0024 -
47 0.0014 0.0050 0.0020 -
48 0.0012 0.0048 0.0016 -
49 0.0011 0.0046 0.0012 -
50 0.0010 0.0044 0.0010 -


Legend
AWG
American Wire Gauge - Used for electrical solid wire. Stranded wire made up of smaller solid wires will be a larger overall diameter than solid wire gauge, but have the same cross-sectional area as a solid wire of the same gauge.
B&S
Brown & Sharpe (same as American Wire Gauge)
SWG (U.S.)
U.S. Steel Standard Wire Gauge, AKA: Washburn & Moen - Used primarily for steel wire and rod products, screens, etc.
SWG (British)

Imperial Standard Wire Gauge - (British legal standard) No. 7/0, the largest size, is 0.50 in. in diameter, and the smallest, No. 50, is 0.001 in.

Piano Wire
American Steel and Wire Co. (ASW) - Music Wire Gauge (Note the wire diamter increases as the gauge increases.)