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AWG Copper Wire Table Size and Data Chart @ 100 Degrees F
The American Wire Gauge (AWG) measurement system was designed with a purpose: for every three steps in the gauge scale, wire area (and weight per unit length) approximately doubles. This is a handy rule to remember when making rough wire size estimations!
For very large wire sizes (fatter than 4/0), the wire gauge system is typically abandoned for cross-sectional area measurement in thousands of circular mils (MCM), borrowing the old Roman numeral "M" to denote a multiple of "thousand" in front of "CM" for "circular mils." The following table of wire sizes does not show any sizes bigger than 4/0 gauge, because solid copper wire becomes impractical to handle at those sizes. Stranded wire construction is favored, instead.
kcmil = circular mils x 1000
AWG | Diameter | Turns of wire, no insulation | Area | |||
(in) | (mm) | (per in) | (per cm) | (kcmil) | (mm2) | |
0000 (4/0) | 0.4600 | 11.684 | 2.17 | 0.856 | 212 | 107 |
000 (3/0) | 0.4096 | 10.405 | 2.44 | 0.961 | 168 | 85.0 |
00 (2/0) | 0.3648 | 9.266 | 2.74 | 1.08 | 133 | 67.4 |
0 (1/0) | 0.3249 | 8.251 | 3.08 | 1.21 | 106 | 53.5 |
1 | 0.2893 | 7.348 | 3.46 | 1.36 | 83.7 | 42.4 |
2 | 0.2576 | 6.544 | 3.88 | 1.53 | 66.4 | 33.6 |
3 | 0.2294 | 5.827 | 4.36 | 1.72 | 52.6 | 26.7 |
4 | 0.2043 | 5.189 | 4.89 | 1.93 | 41.7 | 21.2 |
5 | 0.1819 | 4.621 | 5.50 | 2.16 | 33.1 | 16.8 |
6 | 0.1620 | 4.115 | 6.17 | 2.43 | 26.3 | 13.3 |
7 | 0.1443 | 3.665 | 6.93 | 2.73 | 20.8 | 10.5 |
8 | 0.1285 | 3.264 | 7.78 | 3.06 | 16.5 | 8.37 |
9 | 0.1144 | 2.906 | 8.74 | 3.44 | 13.1 | 6.63 |
10 | 0.1019 | 2.588 | 9.81 | 3.86 | 10.4 | 5.26 |
11 | 0.0907 | 2.305 | 11.0 | 4.34 | 8.23 | 4.17 |
12 | 0.0808 | 2.053 | 12.4 | 4.87 | 6.53 | 3.31 |
13 | 0.0720 | 1.828 | 13.9 | 5.47 | 5.18 | 2.62 |
14 | 0.0641 | 1.628 | 15.6 | 6.14 | 4.11 | 2.08 |
15 | 0.0571 | 1.450 | 17.5 | 6.90 | 3.26 | 1.65 |
16 | 0.0508 | 1.291 | 19.7 | 7.75 | 2.58 | 1.31 |
17 | 0.0453 | 1.150 | 22.1 | 8.70 | 2.05 | 1.04 |
18 | 0.0403 | 1.024 | 24.8 | 9.77 | 1.62 | 0.823 |
19 | 0.0359 | 0.912 | 27.9 | 11.0 | 1.29 | 0.653 |
20 | 0.0320 | 0.812 | 31.3 | 12.3 | 1.02 | 0.518 |
21 | 0.0285 | 0.723 | 35.1 | 13.8 | 0.810 | 0.410 |
22 | 0.0253 | 0.644 | 39.5 | 15.5 | 0.642 | 0.326 |
23 | 0.0226 | 0.573 | 44.3 | 17.4 | 0.509 | 0.258 |
24 | 0.0201 | 0.511 | 49.7 | 19.6 | 0.404 | 0.205 |
25 | 0.0179 | 0.455 | 55.9 | 22.0 | 0.320 | 0.162 |
26 | 0.0159 | 0.405 | 62.7 | 24.7 | 0.254 | 0.129 |
27 | 0.0142 | 0.361 | 70.4 | 27.7 | 0.202 | 0.102 |
28 | 0.0126 | 0.321 | 79.1 | 31.1 | 0.160 | 0.0810 |
29 | 0.0113 | 0.286 | 88.8 | 35.0 | 0.127 | 0.0642 |
30 | 0.0100 | 0.255 | 99.7 | 39.3 | 0.101 | 0.0509 |
31 | 0.00893 | 0.227 | 112 | 44.1 | 0.0797 | 0.0404 |
32 | 0.00795 | 0.202 | 126 | 49.5 | 0.0632 | 0.0320 |
33 | 0.00708 | 0.180 | 141 | 55.6 | 0.0501 | 0.0254 |
34 | 0.00630 | 0.160 | 159 | 62.4 | 0.0398 | 0.0201 |
35 | 0.00561 | 0.143 | 178 | 70.1 | 0.0315 | 0.0160 |
36 | 0.00500* | 0.127* | 200 | 78.7 | 0.0250 | 0.0127 |
37 | 0.00445 | 0.113 | 225 | 88.4 | 0.0198 | 0.0100 |
38 | 0.00397 | 0.101 | 252 | 99.3 | 0.0157 | 0.00797 |
39 | 0.00353 | 0.0897 | 283 | 111 | 0.0125 | 0.00632 |
40 | 0.00314 | 0.0799 | 318 | 125 | 0.00989 | 0.00501 |
AWG | Weight | Copper resistance | NEC copper wire ampacity with 60/75/90°C insulation (A) | |
lb/1000 ft | (??/km) (m??/m) | (??/kft) (m??/ft) | ||
0000 (4/0) | 640.5 | 0.1608 | 0.04901 | 195 / 230 / 260 |
000 (3/0) | 507.9 | 0.2028 | 0.06180 | 165 / 200 / 225 |
00 (2/0) | 402.8 | 0.2557 | 0.07793 | 145 / 175 / 195 |
0 (1/0) | 319.5 | 0.3224 | 0.09827 | 125 / 150 / 170 |
1 | 253.5 | 0.4066 | 0.1239 | 110 / 130 / 150 |
2 | 200.9 | 0.5127 | 0.1563 | 95 / 115 / 130 |
3 | 159.3 | 0.6465 | 0.1970 | 85 / 100 / 110 |
4 | 126.4 | 0.8152 | 0.2485 | 70 / 85 / 95 |
5 | 100.2 | 1.028 | 0.3133 | |
6 | 79.46 | 1.296 | 0.3951 | 55 / 65 / 75 |
7 | 63.02 | 1.634 | 0.4982 | |
8 | 46.97 | 2.061 | 0.6282 | 40 / 50 / 55 |
9 | 39.63 | 2.599 | 0.7921 | |
10 | 31.43 | 3.277 | 0.9989 | 30 / 35 / 40 |
11 | 24.92 | 4.132 | 1.260 | |
12 | 19.77 | 5.211 | 1.588 | 25 / 25 / 30 |
13 | 15.68 | 6.571 | 2.003 | |
14 | 12.43 | 8.286 | 2.525 | 20 / 20 / 25 |
15 | 9.858 | 10.45 | 3.184 | |
16 | 7.818 | 13.17 | 4.016 | ??? / ??? / 18 |
17 | 6.200 | 16.61 | 5.064 | |
18 | 4.917 | 20.95 | 6.385 | ??? / ??? / 14 |
19 | 3.899 | 26.42 | 8.051 | |
20 | 3.092 | 33.31 | 10.15 | |
21 | 2.452 | 42.00 | 12.80 | |
22 | 1.945 | 52.96 | 16.14 | |
23 | 1.542 | 66.79 | 20.36 | |
24 | 1.233 | 84.22 | 25.67 | |
25 | 0.9699 | 106.2 | 32.37 | |
26 | 0.7692 | 133.9 | 40.81 | |
27 | 0.6100 | 168.9 | 51.47 | |
28 | 0.4837 | 212.9 | 64.90 | |
29 | 0.3863 | 268.5 | 81.84 | |
30 | 0.3042 | 338.6 | 103.2 | |
31 | 0.2413 | 426.9 | 130.1 | |
32 | 0.1913 | 538.3 | 164.1 | |
33 | 0.1517 | 678.8 | 206.9 | |
34 | 0.1203 | 856.0 | 260.9 | |
35 | 0.09542 | 1079 | 329.0 | |
36 | 0.07567 | 1361 | 414.8 | |
37 | 0.06001 | 1716 | 523.1 | |
38 | 0.044759 | 2164 | 659.6 | |
39 | 0.03744 | 2729 | 831.8 | |
40 | 0.02993 | 3441 | 1049 |
For some high-current applications, conductor sizes beyond the practical size limit of round wire are required. In these instances, thick bars of solid metal called busbars are used as conductors. Busbars are usually made of copper or aluminum, and are most often uninsulated. Although a square or rectangular cross-section is very common for busbar shape, other shapes are used as well. Cross-sectional area for busbars is typically rated in terms of circular mils (even for square and rectangular bars!), most likely for the convenience of being able to directly equate busbar size with round wire.
Reference: Handbook of Scientific and Engineering Data
Staff of Research and Education Association
American Wire Gauge (AWG
Notes:
1. These resistance values are valid only for the parameters as given. Using conductors having coated strands, different stranding type, and, especially, other temperatures changes the resistance.
2. Formula for temperature change:
3. Conductors with compact and compressed stranding have about 9 percent and 3 percent, respectively,
smaller bare conductor diameters than those shown.
AWG | Strand Type | Inches | MM | Circular MIL Area | WEIGHT LBS./ 1000 FT. | D.C. RESISTANCE OHMS 1000 FT. |
---|---|---|---|---|---|---|
36 | Solid | .0050 | 0,127 | 25.0 | .076 | 445.0 |
36 | 7/44 | .006 | 0,152 | 28.0 | .085 | 371.0 |
34 | Solid | .0063 | 0,160 | 39.7 | .120 | 280.0 |
34 | 7/42 | .0075 | 0,192 | 43.8 | .132 | 237.0 |
32 | Solid | .008 | 0,203 | 67.3 | .194 | 174.0 |
32 | 7/40 | .008 | 0,203 | 67.3 | .203 | 164.0 |
32 | 19/44 | .009 | 0,229 | 76.0 | .230 | 136.0 |
30 | Solid | .010 | 0,254 | 100.0 | .300 | 113.0 |
30 | 7/38 | .012 | 0,305 | 112.0 | .339 | 103.0 |
30 | 19/42 | .012 | 0,305 | 118.8 | .359 | 87.3 |
28 | Solid | .013 | 0,330 | 159.0 | .480 | 70.8 |
28 | 7/36 | .015 | 0,381 | 175.0 | .529 | 64.9 |
28 | 19/40 | .016 | 0,406 | 182.6 | .553 | 56.7 |
27 | 7/35 | .018 | 0,457 | 219.5 | .664 | 54.5 |
26 | Solid | .016 | 0,409 | 256.0 | .770 | 43.6 |
26 | 10/36 | .021 | 0,533 | 250.0 | .757 | 41.5 |
26 | 19/38 | .020 | 0,508 | 304.0 | .920 | 34.4 |
26 | 7/34 | .019 | 0,483 | 277.8 | .841 | 37.3 |
24 | Solid | .020 | 0,511 | 404.0 | 1.22 | 27.3 |
24 | 7/32 | .024 | 0,610 | 448.0 | 1.36 | 23.3 |
24 | 10/34 | .023 | 0,582 | 396.9 | 1.20 | 26.1 |
24 | 19/36 | .024 | 0,610 | 475.0 | 1.43 | 21.1 |
24 | 41/40 | .023 | 0,582 | 384.4 | 1.16 | 25.6 |
22 | Solid | .025 | 0,643 | 640.0 | 1.95 | 16.8 |
22 | 7/30 | .030 | 0,762 | 700.0 | 2.12 | 14.7 |
22 | 19/34 | .031 | 0,787 | 754.1 | 2.28 | 13.7 |
22 | 26/36 | .030 | 0,762 | 650.0 | 1.97 | 15.9 |
20 | Solid | .032 | 0,813 | 1020.0 | 3.10 | 10.5 |
20 | 7/28 | .038 | 0,965 | 1111.0 | 3.49 | 10.3 |
20 | 10/30 | .035 | 0,889 | 1000.0 | 3.03 | 10.3 |
20 | 19/32 | .037 | 0,940 | 1216.0 | 3.70 | 8.6 |
20 | 26/34 | .036 | 0,914 | 1031.9 | 3.12 | 10.0 |
20 | 41/36 | .036 | 0,914 | 1025.0 | 3.10 | 10.0 |
18 | Solid | .040 | 1,020 | 1620.0 | 4.92 | 6.6 |
18 | 7/26 | .048 | 1,219 | 1769.6 | 5.36 | 5.9 |
18 | 16/30 | .047 | 1,194 | 1600.0 | 4.84 | 8.5 |
18 | 19/30 | .049 | 1,245 | 1900.0 | 5.75 | 5.5 |
18 | 41/34 | .047 | 1,194 | 1627.3 | 4.92 | 6.4 |
18 | 65/36 | .047 | 1,194 | 1625.0 | 4.91 | 6.4 |
16 | Solid | .051 | 1,290 | 2580.0 | 7.81 | 4.2 |
16 | 7/24 | .060 | 1,524 | 2828.0 | 8.56 | 3.7 |
16 | 65/34 | .059 | 1,499 | 2579.9 | 7.81 | 4.0 |
16 | 26/30 | .059 | 1,499 | 2600.0 | 7.87 | 4.0 |
16 | 19/29 | .058 | 1,473 | 2426.3 | 7.35 | 4.3 |
16 | 105/36 | .059 | 1,499 | 2625.0 | 7.95 | 4.0 |
14 | Solid | .064 | 1,630 | 4110.0 | 12.40 | 2.6 |
14 | 7/22 | .073 | 1,854 | 4480.0 | 13.56 | 2.3 |
14 | 19/27 | .073 | 1,854 | 3830.4 | 11.59 | 2.7 |
14 | 41/30 | .073 | 1,854 | 4100.0 | 12.40 | 2.5 |
14 | 105/34 | .073 | 1,854 | 4167.5 | 12.61 | 2.5 |
12 | Solid | .081 | 2,050 | 6,530.0 | 19.80 | 1.7 |
12 | 7/20 | .096 | 2,438 | 7,168.0 | 21.69 | 1.5 |
12 | 19/25 | .093 | 2,369 | 6,087.6 | 18.43 | 1.7 |
12 | 65/30 | .095 | 2,413 | 6,500.0 | 19.66 | 1.8 |
12 | 165/34 | .095 | 2,413 | 6,548.9 | 19.82 | 1.6 |
10 | Solid | .102 | 2,590 | 1,038.0 | 31.40 | 1.0 |
10 | 37/26 | .115 | 2,921 | 9,353.6 | 28.31 | 1.1 |
10 | 49/27 | .116 | 2,946 | 9,878.4 | 29.89 | 1.1 |
10 | 105/30 | .116 | 2,946 | 10,530.0 | 31.76 | 0.98 |
8 | 49/25 | .147 | 3,734 | 15,697.0 | 47.53 | 0.67 |
8 | 133/29 | .147 | 3,734 | 16,984.0 | 51.42 | 0.61 |
8 | 655/36 | .147 | 3,734 | 16,625.0 | 49.58 | 0.62 |
6 | 133/27 | .184 | 4,674 | 26,813.0 | 81.14 | 0.47 |
6 | 259/30 | .184 | 4,674 | 25,900.0 | 78.35 | 0.40 |
6 | 1050/36 | .184 | 4,674 | 26,250.0 | 79.47 | 0.39 |
4 | 133/25 | .232 | 5,898 | 42,613.0 | 129.01 | 0.24 |
4 | 259/27 | .232 | 5,898 | 52,214.0 | 158.02 | 0.20 |
4 | 1666/36 | .232 | 5,898 | 41,650.0 | 126.10 | 0.25 |
2 | 133/23 | .292 | 7,417 | 67,936.0 | 205.62 | 0.15 |
2 | 259/26 | .292 | 7,417 | 65,475.0 | 198.14 | 0.16 |
2 | 665/30 | .292 | 7,417 | 66,500.0 | 201.16 | 0.16 |
2 | 2646/36 | .292 | 7,417 | 66,150.0 | 200.28 | 0.16 |
1 | 163,195.9 | .328 | 8,331 | 85,133.0 | 257.60 | 0.12 |
1 | 172,508.0 | .328 | 8,331 | 82,984.0 | 251.20 | 0.13 |
1 | 817/30 | .328 | 8,331 | 81,700.0 | 247.10 | 0.13 |
1 | 2109/34 | .328 | 8,331 | 83,706.0 | 253.29 | 0.12 |
1/0 | 133/21 | .368 | 9,347 | 108,036.0 | 327.05 | 0.096 |
1/0 | 259/24 | .368 | 9,347 | 104,636.0 | 316.76 | 0.099 |
2/0 | 133/20 | .414 | 10,516 | 136,192.0 | 412.17 | 0.077 |
2/0 | 259/23 | .414 | 10,516 | 132,297.0 | 400.41 | 0.077 |
3/0 | 259/22 | .464 | 11,786 | 163,195.0 | 501.70 | 0.062 |
3/0 | 427/24 | .464 | 11,786 | 172,508.0 | 522.20 | 0.059 |
4/0 | 259/21 | .522 | 13,259 | 210,386.0 | 638.88 | 0.049 |
4/0 | 427/23 | .522 | 13,259 | 218,112.0 | 660.01 | 0.047 |
American Wire Gauge (AWG) Wire Size Chart
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