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Copper Wire Properties & Gauge Conversions


See wire gauge conversion chart at bottom of page.  Values given at 25 °C.















      
AWGStrandingApprox. 0.D.Circular
Mil
Area
Weight
(lbs/1000 ft)
Weight
(kg/km)
Resistance
(Ω/1000 ft)
Resistance
(Ω/km)
Inches mm
40 Solid0.0031450.079889.8880.02993   
39 Solid0.0035310.0896912.470.03774   
38 Solid0.0039650.100715.720.04759   
37 Solid0.004453 0.113119.830.06001   
36 Solid0.0050000.127025.00 0.07568 0.113 445.0 1460.0
36 7/440.00600.15228.0 0.085 0.126 371.0 1271.0
35 Solid0.005614 31.520.09542   
34 Solid0.0063040.160139.750.12030.179280.09180.0
34 7/420.00750.19243.80.1320.196237.0777.0
33 Solid0.0070800.179850.130.1517   
32Solid 0.0079500.201963.210.19130.289174.0571.0
327/400.0080.20367.30.2030.302164.0538.0
3219/440.0090.22976.00.2300.342136.0448.0
31 Solid0.0079500.226879.700.2413   
30Solid 0.010030.2548100.50.30420.45113.0365.0
307/38 0.0120.305112.00.3390.504103.0339.0
3019/42 0.0120.305118.00.3590.53487.3286.7
29 Solid0.011260.2860126.70.3836   
28Solid 0.012460.3211159.8 0.48370.7270.8232.0
287/36 0.0150.381175.00.5290.78764.9213.0
2819/40 0.0160.406182.6 0.5530.82356.7186.0
27 Solid0.014190.3604201.50.6100   
277/35 0.0180.457219.1 0.6640.98854.5179.0
26Solid 0.015940.4049254.1 0.76921.1443.6143.0
2610/36 0.0210.533250.00.7571.1341.5137.0
2619/38 0.0200.508304.00.9201.3734.4113.0
267/34 0.0190.483277.10.8411.2537.3122.0
25 Solid0.017900.4547320.40.9699   
24Solid 0.020100.5105404.0 1.2231.8227.389.4
247/320.0240.610448.0 1.362.0223.376.4
2410/340.0230.582396.1 1.20 1.7926.185.6
2419/360.0240.610475.0 1.432.1321.169.2
2441/400.0230.582384.4 1.161.7325.684.0
23 Solid0.022570.5733509.51.542   
22Solid0.025350.6439642.4 1.9452.9116.855.3
227/300.0300.762700.0 2.123.1614.748.4
2219/340.0310.787754.12.283.3913.745.1
2226/360.0300.762650.01.972.9315.952.3
21 Solid0.028460.7229810.12.452   
20Solid 0.031960.811810223.0924.6110.534.6
207/280.0380.96511113.495.1910.333.8
2010/300.0350.88910003.034.0510.333.9
2019/320.0370.94012163.705.488.628.3
2026/340.0360.91410313.124.6410.033.0
2041/360.0360.91410253.104.6110.032.9
19 Solid0.035890.911612883.899   
18Solid 0.04031.02416244.9177.326.621.8
187/260.0481.21917695.367.985.919.2
1816/300.0471.19416004.847.208.521.3
1819/300.0491.24519005.758.565.517.9
1841/340.0471.19416274.927.326.420.9
1865/360.0471.19416254.917.316.421.0
17 Solid0.045261.15020486.200   
16Solid0.050821.29125837.81811.604.213.7
167/240.0601.52428288.56 12.743.712.0
1665/340.0591.49925797.8111.624.013.2
1626/300.0591.49926007.8711.714.013.1
1619/290.0581.47324267.3510.944.314.0
16105/360.0591.49926257.9511.834.013.1
15 Solid0.057071.450325712.43   
14Solid0.064081.628410712.4318.502.68.6
147/220.0731.854448013.5620.182.37.6
1419/270.0731.854383011.5917.252.78.9
1441/300.0731.854410012.4018.452.58.3
14105/340.0731.854416712.6118.772.58.2
13 Solid0.071961.828517815.68   
12 Solid0.080812.053653019.77   
11 Solid0.090742.305823424.92   
10 Solid0.10192.5881038031.43   
9 Solid0.11442.9061309039.63   
8 Solid0.12853.2641651049.98   
7 Solid0.14433.6652082063.02   
6 Solid0.16204.1152625079.46   
5 Solid0.18194.62033100100.2   
4 Solid0.20435.18941740126.4   
3 Solid0.22945.82752640159.3   
2 Solid0.25766.54366370200.9   
1 Solid0.28937.34883690253.3   
0 Solid0.32498.252105500319.5   
00 Solid0.36489.266133100402.8   
000 Solid0.409610.40167800507.9   
0000 Solid0.460011.68211600640.5   


Wire Gauge Conversions
All Units Are in Inches
 
GAUGE # AWG W & M SWG BWG U.S. Standard
7/0 0.6513 0.490 0.500  0.5000
6/0 0.5800 0.460 0.464  0.4688
5/0 0.5165 0.430 0.432  0.4375
4/0 0.4600 0.3938 0.400 0.454 0.4063
3/0 0.4096 0.3625 0.372 0.425 0.3750
2/0 0.3648 0.3310 0.348 0.380 0.3438
1/0 0.3249 0.3065 0.324 0.340 0.3125
1 0.2893 0.2830 0.300 0.300 0.2813
2 0.2576 0.2625 0.276 0.284 0.2656
3 0.2294 0.2437 0.252 0.259 0.2391
4 0.2043 0.2253 0.232 0.238 0.2242
5 0.1819 0.2070 0.212 0.220 0.2092
6 0.1620 0.1920 0.192 0.203 0.1943
7 0.1443 0.1770 0.176 0.180 0.1793
8 0.1285 0.1620 0.160 0.165 0.1644
9 0.1144 0.1483 0.144 0.148 0.1495
10 0.1019 0.1350 0.128 0.134 0.1345
11 0.0907 0.1205 0.116 0.120 0.1196
12 0.0808 0.1055 0.104 0.109 0.1046
13 0.0719 0.0915 0.092 0.095 0.0897
14 0.0641 0.0800 0.080 0.083 0.0747
15 0.0571 0.0720 0.072 0.072 0.0673
16 0.0508 0.0625 0.064 0.065 0.0598
17 0.04526 0.054 0.056 0.058 0.0538
18 0.04030 0.0475 0.048 0.049 0.0478
19 0.03589 0.0410 0.040 0.042 0.0418
20 0.03196 0.0348 0.036 0.035 0.0359
21 0.02846 0.03175 0.032 0.032 0.0329
22 0.02535 0.0286 0.028 0.028 0.0299
23 0.02257 0.0258 0.024 0.025 0.0269
24 0.02010 0.0230 0.022 0.022 0.0239
25 0.01790 0.0204 0.020 0.020 0.0209
26 0.01594 0.0181 0.018 0.018 0.0179
27 0.01420 0.0173 0.0164 0.016 0.0164
28 0.01264 0.0162 0.0148 0.014 0.0149
29 0.01126 0.0150 0.0136 0.013 0.0135
30 0.0103 0.014 0.0124 0.012 0.0120
31 0.00893 0.0132 0.0116 0.010 0.0109
32 0.00795 0.0128 0.0108 0.009 0.0102
33 0.00708 0.0118 0.0100 0.008 0.0094
34 0.00630 0.0104 0.0092 0.007 0.0086
35 0.00561 0.0095 0.0084 0.005 0.0078
36 0.00500 0.0090 0.0076 0.004 0.0070
37 0.00445 0.0085 0.0068   
38 0.00396 0.0080 0.0060   
39 0.00353 0.0075 0.0052   
40 0.00314 0.007 0.0048   
41 0.00279 0.0066 0.0044   
42 0.00249 0.0062 0.0040   
43 0.00221 0.0060 0.0036   
44 0.00198 0.0058 0.0032   
45 0.00176 0.0055 0.0028   
46 0.00157 0.0052 0.0024   
47 0.00140 0.0050 0.0016   
48 0.00124 0.0048 0.0012   
49 0.00111 0.0046 0.0010   
50 0.00099 0.0044    
51 0.00088     
52 0.00078     
53 0.00070     
54 0.00060     
55 0.00050     
56 0.00040     
  • AWG = American Wire Gauge (Brown & Sharpe)
  • W & M = Washburn & Moen (steel wire gauge)
  • SWG = Imperial Standard Wire Gauge
  • BWG = Birmingham or Stubs Wire Gauge
  • US Standard = United States Standard (Revised)
 



Webmaster: Kirt Blattenberger, BSEE, UVM 1989