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What is AWG?

Since 1857, the American wire gauge (AWG), also known as the Brown & Sharpe wire gauge, has been predominantly used in the United States to determine the current-carrying capacity for round, solid, nonferrous, electrically conducting wire by using the cross-sectional area as a important determining factor.

This AWG table is for single, solid, round conductors. Stranded wire's cross-sectional area of the total conductors is used to determine the AWG, which in turn determines the electrical resistance and current-carrying capacity. Stranded wire, when compared to solid wire, will always have a larger overall diameter due to small gaps between strands.

Category 5, Category 6 network cable and many other cables will commonly have the specification printed on the jacket. Cat5e network cable in commonly 24 AWG while Serial ATA cables are normally 26 AWG.

This table is based on plastic insulation and does not take skin effect into account. The diameter information, allowable current (ampacity) and resistance of various gauges wires applies to solid wires while assuming DC/AC frequencies at 60 Hz or less.

AWG Diameter Turns of Wire Copper Resistance (Ω/kFT) Copper Resistance (Ω/km) NEC Copper Wire Ampacity with 60/75/90°C insulation (A) Approximate Stranded Metric Equivalents
0000 (4/0) 11.684 mm
0.46 inch
0.856 per cm
2.17 per inch
0.04901 0.1608 195 / 230 / 260  
000 (3/0) 10.404 mm
0.4096 inch
0.961 per cm
2.44 per inch
0.0618 0.2028 165 / 200 / 225  
00 (2/0) 9.266 mm
0.3648 inch
1.08 per cm
2.74 per inch
0.07793 0.2557 145 / 175 / 195  
0 (1/0) 8.252 mm
0.3249 inch
1.21 per cm
3.08 per inch
0.09827 0.3224 125 / 150 / 170  
1 7.348 mm
0.2893 inch
1.36 per cm
3.46 per inch
0.1239 0.4066 110 / 130 / 150  
2 6.544 mm
0.2576 inch
1.53 per cm
3.88 per inch
0.1563 0.5127 95 / 115 / 130  
3 5.827 mm
0.2294 inch
1.72 per cm
4.36 per inch
0.197 0.6465 85 / 100 / 110 196/0.4
4 5.189 mm
0.2043 inch
1.93 per cm
4.89 per inch
0.2485 0.8152 70 / 85 / 95  
5 4.621 mm
0.1819 inch
2.16 per cm
5.5 per inch
0.3133 1.028   126/0.4
6 4.115 mm
0.162 inch
2.43 per cm
6.17 per inch
0.3951 1.296 55 / 65 / 75  
7 3.665 mm
0.1443 inch
2.73 per cm
6.93 per inch
0.4982 1.634   80/0.4
8 3.264 mm
0.1285 inch
3.06 per cm
7.78 per inch
0.6282 2.061 40 / 50 / 55  
9 2.906 mm
0.1144 inch
3.44 per cm
8.74 per inch
0.7921 2.599   84/0.3
10 2.588 mm
0.1019 inch
3.86 per cm
9.81 per inch
0.9989 3.277 30 / 35 / 40
11 2.305 mm
0.0907 inch
4.34 per cm
11 per inch
1.26 4.132   56/0.3
12 2.053 mm
0.0808 inch
4.87 per cm
12.4 per inch
1.588 5.211 25 / 25 / 30 (20)  
13 1.828 mm
0.072 inch
5.47 per cm
13.9 per inch
2.003 6.571   50/0.25
14 1.628 mm
0.0641 inch
6.14 per cm
15.6 per inch
2.525 8.286 20 / 20 / 25 (15)  
15 1.45 mm
0.0571 inch
6.9 per cm
17.5 per inch
3.184 10.45   30/0.25
16 1.291 mm
0.0508 inch
7.75 per cm
19.7 per inch
4.016 13.17 -- / -- / 18 (10)
17 1.15 mm
0.0453 inch
8.7 per cm
22.1 per inch
5.064 16.61   32/0.2
18 1.024 mm
0.0403 inch
9.77 per cm
24.8 per inch
6.385 20.95 -- / -- / 14 (7) 24/0.2
19 0.912 mm
0.0359 inch
11 per cm
27.9 per inch
8.051 26.42  
20 0.812 mm
0.032 inch
12.3 per cm
31.3 per inch
10.15 33.31   16/0.2
21 0.723 mm
0.0285 inch
13.8 per cm
35.1 per inch
12.8 42    
22 0.644 mm
0.0253 inch
15.5 per cm
39.5 per inch
16.14 52.96   7/0.25
23 0.573 mm
0.0226 inch
17.4 per cm
44.3 per inch
20.36 66.79    
24 0.511 mm
0.0201 inch
19.6 per cm
49.7 per inch
25.67 84.22   1/0.5, 7/0.2, 30/0.1
25 0.455 mm
0.0179 inch
22 per cm
55.9 per inch
32.37 106.2    
26 0.405 mm
0.0159 inch
24.7 per cm
62.7 per inch
40.81 133.9   7/0.15
27 0.361 mm
0.0142 inch
27.7 per cm
70.4 per inch
51.47 168.9    
28 0.321 mm
0.0126 inch
31.1 per cm
79.1 per inch
64.9 212.9    
29 0.286 mm
0.0113 inch
35 per cm
88.8 per inch
81.84 268.5    
30 0.255 mm
0.01 inch
39.3 per cm
99.7 per inch
103.2 338.6   1/0.25, 7/0.1
31 0.227 mm
0.00893 inch
44.1 per cm
112 per inch
130.1 426.9    
32 0.202 mm
0.00795 inch
49.5 per cm
126 per inch
164.1 538.3   1/0.2, 7/0.08
33 0.18 mm
0.00708 inch
55.6 per cm
141 per inch
206.9 678.8    
34 0.16 mm
0.0063 inch
62.4 per cm
159 per inch
260.9 856    
35 0.143 mm
0.00561 inch
70.1 per cm
178 per inch
329 1079    
36 0.127 mm
0.005 inch
78.7 per cm
200 per inch
414.8 1361    
37 0.113 mm
0.00445 inch
88.4 per cm
225 per inch
523.1 1716    
38 0.101 mm
0.00397 inch
99.3 per cm
252 per inch
659.6 2164    
39 0.0897 mm
0.00353 inch
111 per cm
283 per inch
831.8 2729    
40 0.0799 mm
0.00314 inch
125 per cm
318 per inch
1049 3441