AWG Copper Wire Size and Data Chart @ 100°F

The AWG Copper Wire Size and Data Table at 100 °F Fahrenheit provide information on the American Wire Gauge (AWG) measurement system. This system was designed for a specific purpose: every three steps in the gauge scale result in approximately doubling the wire area and weight per unit length. Remembering this rule is useful for making rough wire size estimations.

For wire sizes larger than 4/0, the wire gauge system is usually disregarded in favor of measuring cross-sectional area in thousands of circular mils (MCM). The table excludes sizes beyond 4/0 gauge, as handling solid copper wire becomes impractical at those dimensions. In such cases, stranded wire construction is preferred.

kcmil = circular mils x 1000

Table 1.1: AWG Properties

AWG	(inches)	(mm)	(per inch)	(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
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	5.5	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	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	6.9	3.26	1.65
16	0.0508	1.291	19.7	7.75	2.58	1.31
17	0.0453	1.150	22.1	8.7	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	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	0.81	0.41
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	0.32	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	0.16	0.081
29	0.0113	0.286	88.8	35	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	0.032
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	0.016
36	0.00500*	0.127	200	78.7	0.025	0.0127
37	0.00445	0.113	225	88.4	0.0198	0.01
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

In high-current applications, where round wire reaches impractical size limits, conductors often demand larger sizes. Busbars, thick bars of solid metal, serve as conductors in such cases. Typically made of copper or aluminum, busbars are commonly uninsulated. While square or rectangular cross-sections are prevalent, other shapes find application. Busbars, including square and rectangular ones, are usually rated in terms of circular mils for ease of directly equating their size with round wire.

AWG Copper Wire Size Chart
Copper Wire Size Chart

Notes:

The provided resistance values are applicable solely to the given parameters. Utilizing conductors with coated strands, varying stranding types, or different temperatures will alter the resistance.
The formula for temperature change is as follows:
R2 = R1, [1 + α (T2 − 75)] where αcu = 0.00323, αAL = 0.00330
Conductors with compact and compressed stranding exhibit approximately 9 percent and 3 percent smaller bare conductor diameters, respectively, compared to those indicated.

Table 2.1: AWG & Ampacity with Insulation (60/75/90 °C)

AWG	lb/1000 ft	(??/km) OR (m??/m)	(??/kft) OR (m??/ft	NEC copper wire ampacity with 60/75/90 °C insulation (A)
0000 (4/0)	640.5	0.1608	0.04901	195 / 230 / 260
000 (3/0)	507.9	0.2028	0.0618	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	0.197	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	1.26	–
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	–

Table 2.2: AWG & Ampacity with Insulation (60/75/90 °C)

AWG	lb/1000 ft	(??/km) OR (m??/m)	(??/kft) OR (m??/ft	NEC Copper Wire Ampacity with 60/75/90 °C Insulation (A)
16	7.818	13.17	4.016	??? / ??? / 18
17	6.2	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	12.8	–
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	0.61	168.9	51.47	–
28	0.4837	212.9	64.9	–
29	0.3863	268.5	81.84	–
30	0.3042

AWG Wire Gauge Chart
AWG Wire Size Chart

Table 3.1: AWG and Electrical Properties

AWG	Strand Type	Inches	MM	Circular MIL Area
36	Solid	0.0050	0.127	25.0
36	7/44	0.006	0.152	28.0
34	Solid	0.0063	0.160	39.7
34	7/42	0.0075	0.192	43.8
32	Solid	0.008	0.203	67.3
32	7/40	0.008	0.203	67.3
32	19/44	0.009	0.229	76.0
30	Solid	0.010	0.254	100.0
30	7/38	0.012	0.305	112.0
30	19/42	0.012	0.305	118.8
28	Solid	0.013	0.330	159.0
28	7/36	0.015	0.381	175.0
28	19/40	0.016	0.406	182.6
27	7/35	0.018	0.457	219.5
26	Solid	0.016	0.409	256.0
26	10/36	0.021	0.533	250.0
26	19/38	0.020	0.508	304.0
26	7/34	0.019	0.483	277.8
24	Solid	0.020	0.511	404.0
24	7/32	0.024	0.610	448.0
24	10/34	0.023	0.582	396.9
24	19/36	0.024	0.610	475.0
24	41/40	0.023	0.582	384.4

Table 3.2: AWG and Electrical Properties

AWG	Strand Type	Inches	MM	Circular MIL Area
22	Solid	0.025	0.643	640.0
22	7/30	0.030	0.762	700.0
22	19/34	0.031	0.787	754.1
22	26/36	0.030	0.762	650.0
20	Solid	0.032	0.813	1020.0
20	7/28	0.038	0.965	1111.0
20	10/30	0.035	0.889	1000.0
20	19/32	0.037	0.940	1216.0
20	26/34	0.036	0.914	1031.9
20	41/36	0.036	0.914	1025.0
18	Solid	0.040	1.020	1620.0
18	7/26	0.048	1.219	1769.6
18	16/30	0.047	1.194	1600.0
18	19/30	0.049	1.245	1900.0
18	41/34	0.047	1.194	1627.3
18	65/36	0.047	1.194	1625.0
16	Solid	0.051	1.290	2580.0
16	7/24	0.060	1.524	2828.0
16	65/34	0.059	1.499	2579.9
16	26/30	0.059	1.499	2600.0
16	19/29	0.058	1.473	2426.3
16	105/36	0.059	1.499	2625.0
14	Solid	0.064	1.630	4110.0
14	7/22	0.073	1.854	4480.0
14	19/27	0.073	1.854	3830.4
14	41/30	0.073	1.854	4100.0
14	105/34	0.073	1.854	4167.5
12	Solid	0.081	2.050	6530.0

Table 3.3: AWG and Electrical Properties

AWG	Strand Type	Inches	MM	Circular MIL Area
12	7/20	0.096	2.438	7168.0
12	19/25	0.093	2.369	6087.6
12	65/30	0.095	2.413	6500.0
12	165/34	0.095	2.413	6548.9
10	Solid	0.102	2.590	1038.0
10	37/26	0.115	2.921	9353.6
10	49/27	0.116	2.946	9878.4
10	105/30	0.116	2.946	10530

Table 1.1: AWG Properties

Table 2.1: AWG & Ampacity with Insulation (60/75/90 °C)

Table 2.2: AWG & Ampacity with Insulation (60/75/90 °C)

Table 3.1: AWG and Electrical Properties

Table 3.2: AWG and Electrical Properties

Table 3.3: AWG and Electrical Properties

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