Table of wire size and current capacity
Please be aware - this is not an official list of any type - I got this from a paper copy and may contain errors - if your life depends on the wire you want to use - check the information in this table with a "Official" publication. I make no promises of anything printed here being accurate and is presented for easy reference only.
If you want to calculate the resistance per foot of a given wire Click Here!
AWG gauge |
Diameter Inches |
Diameter mm |
Ohms per 1000 ft |
Ohms per km |
Maximum amps - chassis wiring |
Maximum amps - power transmission |
OOOO |
0.46 |
11.684 |
0.049 |
0.16072 |
380 |
302 |
OOO |
0.4096 |
10.40384 |
0.0618 |
0.202704 |
328 |
239 |
OO |
0.3648 |
9.26592 |
0.0779 |
0.255512 |
283 |
190 |
0 |
0.3249 |
8.25246 |
0.0983 |
0.322424 |
245 |
150 |
1 |
0.2893 |
7.34822 |
0.1239 |
0.406392 |
211 |
119 |
2 |
0.2576 |
6.54304 |
0.1563 |
0.512664 |
181 |
94 |
3 |
0.2294 |
5.82676 |
0.197 |
0.64616 |
158 |
75 |
4 |
0.2043 |
5.18922 |
0.2485 |
0.81508 |
135 |
60 |
5 |
0.1819 |
4.62026 |
0.3133 |
1.027624 |
118 |
47 |
6 |
0.162 |
4.1148 |
0.3951 |
1.295928 |
101 |
37 |
7 |
0.1443 |
3.66522 |
0.4982 |
1.634096 |
89 |
30 |
8 |
0.1285 |
3.2639 |
0.6282 |
2.060496 |
73 |
24 |
9 |
0.1144 |
2.90576 |
0.7921 |
2.598088 |
64 |
19 |
10 |
0.1019 |
2.58826 |
0.9989 |
3.276392 |
55 |
15 |
11 |
0.0907 |
2.30378 |
1.26 |
4.1328 |
47 |
12 |
12 |
0.0808 |
2.05232 |
1.588 |
5.20864 |
41 |
9.3 |
13 |
0.072 |
1.8288 |
2.003 |
6.56984 |
35 |
7.4 |
14 |
0.0641 |
1.62814 |
2.525 |
8.282 |
32 |
5.9 |
15 |
0.0571 |
1.45034 |
3.184 |
10.44352 |
28 |
4.7 |
16 |
0.0508 |
1.29032 |
4.016 |
13.17248 |
22 |
3.7 |
17 |
0.0453 |
1.15062 |
5.064 |
16.60992 |
19 |
2.9 |
18 |
0.0403 |
1.02362 |
6.385 |
20.9428 |
16 |
2.3 |
19 |
0.0359 |
0.91186 |
8.051 |
26.40728 |
14 |
1.8 |
20 |
0.032 |
0.8128 |
10.15 |
33.292 |
11 |
1.5 |
21 |
0.0285 |
0.7239 |
12.8 |
41.984 |
9 |
1.2 |
22 |
0.0254 |
0.64516 |
16.14 |
52.9392 |
7 |
0.92 |
23 |
0.0226 |
0.57404 |
20.36 |
66.7808 |
4.7 |
0.729 |
24 |
0.0201 |
0.51054 |
25.67 |
84.1976 |
3.5 |
0.577 |
25 |
0.0179 |
0.45466 |
32.37 |
106.1736 |
2.7 |
0.457 |
26 |
0.0159 |
0.40386 |
40.81 |
133.8568 |
2.2 |
0.361 |
27 |
0.0142 |
0.36068 |
51.47 |
168.8216 |
1.7 |
0.288 |
28 |
0.0126 |
0.32004 |
64.9 |
212.872 |
1.4 |
0.226 |
29 |
0.0113 |
0.28702 |
81.83 |
268.4024 |
1.2 |
0.182 |
30 |
0.01 |
0.254 |
103.2 |
338.496 |
0.86 |
0.142 |
31 |
0.0089 |
0.22606 |
130.1 |
426.728 |
0.7 |
0.113 |
32 |
0.008 |
0.2032 |
164.1 |
538.248 |
0.53 |
0.091 |
Metric 2.0 |
0.00787 |
0.200 |
169.39 |
555.61 |
0.51 |
0.088 |
33 |
0.0071 |
0.18034 |
206.9 |
678.632 |
0.43 |
0.072 |
Metric 1.8 |
0.00709 |
0.180 |
207.5 |
680.55 |
0.43 |
0.072 |
34 |
0.0063 |
0.16002 |
260.9 |
855.752 |
0.33 |
0.056 |
Metric 1.6 |
0.0063 |
0.16002 |
260.9 |
855.752 |
0.33 |
0.056 |
35 |
0.0056 |
0.14224 |
329 |
1079.12 |
0.27 |
0.044 |
Metric 1.4 |
.00551 |
.140 |
339 |
1114 |
0.26 |
0.043 |
36 |
0.005 |
0.127 |
414.8 |
1360 |
0.21 |
0.035 |
Metric 1.25 |
.00492 |
0.125 |
428.2 |
1404 |
0.20 |
0.034 |
37 |
0.0045 |
0.1143 |
523.1 |
1715 |
0.17 |
0.0289 |
Metric 1.12 |
.00441 |
0.112 |
533.8 |
1750 |
0.163 |
0.0277 |
38 |
0.004 |
0.1016 |
659.6 |
2163 |
0.13 |
0.0228 |
Metric 1 |
.00394 |
0.1000 |
670.2 |
2198 |
0.126 |
0.0225 |
39 |
0.0035 |
0.0889 |
831.8 |
2728 |
0.11 |
0.0175 |
40 |
0.0031 |
0.07874 |
1049 |
3440 |
0.09 |
0.0137 |
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Page last updated 8/24/2005