AWG Wire Gauge Comparison Table

May 18, 2024 Roberto Magalhães

Commonly Used Wire Gauge Comparison Chart, Wire Diameter AWG Comparison Chart

AWG (American Wire Gauge) is a standard for distinguishing wire diameters, also known as Brown & Sharpe wire gauge.

This standardized wire gauge system began to be used in the United States in 1857. The number in front of the AWG (such as 24 AWG, 26 AWG) represents the number of holes a wire must pass through before reaching its final diameter.

The higher the number, the more holes the wire passes through and the smaller the wire diameter. SWG (Standard Wire Gauge) is one of the wire and cable industry standards. BWG (Birmingham Wire Gauge) refers to the gauge of Birmingham wire, which indicates the thickness or diameter of the material.

Wire gauge	SWG		BWG		GB		AWG
Wire gauge	Inch	mm	Inch	mm	Inch	mm	Inch	mm
7/0	0.5	12.7	–	–	0.6666	16,932	–	–
6/0	0.464	11,786	–	–	0.625	15,875	0.58	14,732
5/0	0.432	10,973	0.5	12.7	0.5883	14,943	0.5165	13,119
4/0	0.4	10.16	0.454	11,532	0.5416	13,757	0.46	11,684
3/0	0.372	9,449	0.425	10,795	0.5	12.7	0.4096	10,404
2/0	0.348	8,839	0.33	9,652	0.1152	11,308	0.3648	9,266
0	0.324	8.23	0.34	8,639	0.3954	10,069	0.3249	8,252
1	0.3	7.62	0.3	7.62	0.3532	8,971	0.2893	7,348
two	0.276	7.01	0.284	7,214	0.3147	7,993	0.2576	6,544
3	0.252	6,401	0.259	6,579	0.2804	7,122	0.2294	5,827
4	0.232	5,893	0.238	6,045	0.25	6:35 am	0.2043	5,189
5	0.212	5,385	0.22	5,588	0.2225	5,652	0.1819	4,621
6	0.192	4,877	0.203	5,156	0.1981	5,032	0.162	4,115
7	0.176	4.47	0.18	4,572	0.1764	4,481	0.1443	3,665
8	0.16	4,046	0.165	4,191	0.157	3,988	0.1285	3,264
9	0.144	3,658	0.148	3,759	0.1398	3,551	0.1144	2,906
10	0.128	3,251	0.134	3,404	0.125	3,175	0.1019	2,588
11	0.116	2,946	0.12	3,048	0.1313	2,827	0.0907	2,305
12	0.104	2,642	0.109	2,769	0.0991	2,517	0.0808	2,053
13	0.092	2,337	0.095	2,413	0.0882	2.24	0.072	1,828
14	0.08	2,032	0.083	2,108	0.0785	1994	0.0648	1,628
15	0.072	1,829	0.072	1,829	0.0699	1,775	0.0571	1.45
16	0.064	1,626	0.065	1,651	0.0625	1,588	0.0508	1,291
17	0.056	1,422	0.058	1,473	0.0556	1,412	0.0453	1.15
18	0.048	1,219	0.049	1,245	0.0495	1,257	0.0403	1,024
19	0.04	1,016	0.042	1,067	0.044	1,118	0.0359	0.912
20	0.036	0.914	0.035	0.839	0.0392	0.996	0.032	0.812
21	0.032	0.813	0.032	0.813	0.0349	0.887	0.0285	0.723
22	0.028	0.711	0.028	0.711	0.03125	0.794	0.02535	0.644
23	0.024	0.61	0.025	0.635	0.02782	0.707	0.0201	0.573
24	0.022	0.559	0.022	0.559	0.02476	0.629	0.0179	0.511
25	0.02	0.508	0.02	0.508	0.02204	0.56	0.01594	0.455
26	0.018	0.457	0.018	0.457	0.01961	0.498	0.0142	0.405
27	0.0164	0.417	0.016	0.406	0.1745	0.443	0.0142	0.361
28	0.0149	0.376	0.014	0.356	0.01562	0.397	0.01264	0.321
29	0.0136	0.345	0.013	0.33	0.0139	0.353	0.01126	0.286
30	0.0124	0.315	0.012	0.305	0.0123	0.312	0.01003	0.255
31	0.0116	0.295	0.01	0.254	0.011	0.27	0.00893	0.227
32	0.0109	0.274	0.009	0.229	0.0098	0.249	0.00795	0.202
33	0.01	0.254	0.008	0.203	0.0087	0.221	0.00708	0.18
34	0.0092	0.234	0.007	0.178	0.0077	0.196	0.0063	0.16
35	0.0084	0.213	0.005	0.127	0.0069	0.175	0.00561	0.143
36	0.0076	0.193	0.004	0.102	0.0061	0.155	0.005	0.127
37	0.0068	0.173			0.0054	0.137	0.00445	0.113
38	0.006	0.152			0.0048	0.122	0.00396	0.101
39	0.0052	0.132			0.0043	0.109	0.00353	0.09
40	0.0048	0.122			0.00386	0.098	0.00314	0.08
41	0.0044	0.112			0.00343	0.087	0.0028	0.071
42	0.004	0.102			0.00306	0.078	0.00249	0.063
43	0.0036	0.091			0.00272	0.069	0.00222	0.056
44	0.0032	0.081			0.00242	0.061	0.00198	0.05
45	0.0028	0.071			0.00215	0.055	0.00176	0.048
46	0.0024	0.061			0.00192	0.049	0.00157	0.046
47	0.002	0.051			0.0017	0.043	0.0014	0.035
48	0.0016	0.041			0.00152	0.039	0.00124	0.032
49	0.0012	0.03			0.00135	0.034	0.00111	0.028
50	0.001	0.025			0.0012	0.03	0.00099	0

Conductor Resistance, AWG Wire Gauge, Wire Diameter Comparison Table

Resistivity is a physical quantity used to represent the electrical resistance characteristics of various materials. The resistance of a wire made of a certain material, 1 meter long, with a cross-sectional area of 1 square millimeter and at room temperature (20 ℃), is called the resistivity of that material.

According to Ohm's Law: R=PL/S, the conductor resistance can be calculated. R is the resistance, in ohms. P is the resistivity, in ohmmeters, and is related to the conductor material. L is the length of the conductor, in meters. S is the cross-sectional area of the conductor, in square meters.

Meter	Inches	Diameter		Cross section.Area		Conductor Resistance DCR@20℃		Weight
AWG	Inches	thousandths	mm	Circ.mils	M²	ohms/M	Ohm/km	Pounds/m	kg/km
40	0.0031	3.1	0.079	9.6	0.0049	1080	3540	0.0291	0.0433
39	0.0035	3.5	0.089	12.3	0.0062	847	2780	0.0371	0.0552
38	0.004	4	0.102	16	0.0081	648	2130	0.0484	0.72
37	0.0045	4.5	0.114	20.3	0.0103	512	1680	0.0613	0.0912
36	0.005	5	0.127	25	0.0127	415	1360	0.0757	0.113
35	0.0056	5.6	0.142	31.4	0.0159	331	1080	0.0949	0.141
34	0.0063	6.3	0.16	39.7	0.0201	261	857	0.12	0.179
33	0.0071	7.1	0.18	50.4	0.0255	206	675	0.153	0.228
32	0.008	8	0.203	64	0.0324	162	532	0.194	0.289
31	0.0089	8.9	0.226	79.2	0.0401	131	430	0.24	0.357
30	0.01	10	0.254	100	0.0507	104	340	0.303	0.451
29	0.0113	11.3	0.287	128	0.0649	81.2	266	0.387	0.576
28	0.0126	12.6	0.32	159	0.0806	65.3	214	0.481	0.716
27	0.0142	14.2	0.361	202	0.102	51.4	169	0.61	0.908
26	0.0159	15.9	0.404	253	0.128	41	135	0.765	1.14
25	0.0179	17.9	0.455	320	0.162	32.4	106	0.97	1.44
24	0.0201	20.1	0.511	404	0.205	25.7	84.2	1.22	1.82
23	0.0266	22.6	0.574	511	0.259	20.3	66.6	1.55	2.31
22	0.0253	25.3	0.643	640	0.324	16.2	53.2	1.94	2.89
21	0.0285	28.5	0.724	812	0.411	12.8	41.9	2.46	3.66
20	0.032	32	0.813	1020	0.519	10.1	33.2	3.1	4.61
19	0.0359	35.9	0.912	1290	0.653	8.05	26.4	3.9	5.8
18	0.0403	40.3	1.02	1620	0.823	6.39	21	4.92	7.32
17	0.0453	45.3	1.15	2050	1.04	5.05	16.6	6.21	9.24
16	0.0508	50.8	1.29	2580	1.31	4.02	13.2	7.81	11.6
15	0.0571	57.1	1.45	3260	1.65	3.18	10.4	9.87	14.7
14	0.0641	64.1	1.63	4110	20.8	2.52	8.28	12.4	18.5
13	0.072	72	1.83	5180	2.63	two	6.56	15.7	23.4
12	0.0808	80.8	2.05	6530	3.31	1.59	5.21	19.8	29.5
11	0.0907	90.7	2.3	8230	4.17	1.26	4.14	24.9	37.1
10	0.1019	101.9	2,588	10380	5.26	0.9988	3.23	31.4	46.8
9	0.1144	114.4	2,906	13090	6.63	0.7925	2.6	39.6	59
8	0.1285	128.5	3,265	16510	8.37	0.6281	2,061	50	74.4
7	0.1443	144.3	3,655	20820	10:55 am	0.4981	1,634	63	93.8
6	0.162	162	4,115	26240	13.3	0.3952	1,296	79.4	118
5	0.1819	181.9	4.62	33090	16.77	0.3134	1,028	100	149
4	0.2043	204.3	5,189	41740	9:15 p.m.	0.2485	0.8152	126	188
3	0.2294	229.4	5,827	52620	26.67	0.1917	0.6466	159	237
two	0.2576	257.6	6,543	66360	33.62	0.1563	0.5128	201	299
1	0.2893	289.3	7,348	83690	42.41	0.1239	0.4065	253	377
1/0	0.3249	324.9	8,252	105600	53.49	0.03925	0.3223	319	476
2/0	0.3648	364.8	9,266	133100	67.43	0.07793	0.2557	403	599
3/0	0.4096	409.6	10.4	167800	85.01	0.06182	0.2028	508	756
4/0	0.46	460	11.68	211600	107.22	0.04901	0.1608	641	953

Copper Wire Gauge Table

AWG	Diameter		Area			Weight kg/km	No./mm
	Thousandths	mm	CM	in ²	millimeters ²
1	289.3	7,348	83,694	0.06573	42.41	377	1/7,349
		8,508				379	19/1,690
		8,500				379	37/1,210
		8,480				377	61/0.941
two	257.6	6,544	66,358	0.05212	33.63	299	1/6544
		7,410				299	7/2,474
		7,551				299	19/1,502
		7,590				302	37/1,080
4	204.3	5,189	41,738	0.03278	9:15 p.m.	188	1/5,190
		5,960				188	7/1,962
		5,991				188	19/1,191
		5,992				188	37/0.854
		6,032				188	133/.450
		6,036				192.2	420/0.254
6	162	4,115	26,244	0.0 2061	13.3	118.2	1/4,116
		4,770				119.0	7/1,560
		4,829				120.0	19/0.950
		4,749				118.0	37/0.677
		4,803				121.0	266/.254
8	128.5	3,264	16,512	0.01297	8,368	74.39	1/3,265
		3,690				74.43	7/1,234
		3,771				74.60	19/0.749
		3,760				74.40	37/0.537
		3,783				75.00	133/0.284
10	101.9	2,588	10,384	0.008156	5,262	46.78	1/2,589
		2,961				46.94	7/0.980
		3,005				47.40	19/0.595
		3,017				47.80	105/0.254
		2,974				46.40	259/.160
12	80.81	2,053	6.53	0.005129	3,309	29.42	1/2,053
		2,325				29.43	7/0.776
		2,371				29:37	19/0.471
		2,365				29.58	65/0.254
		2,395				30:10	168/.160
14	64.08	1,628	4,106	0.003225	2,081	6:50 p.m.	1/1,630
		1,845				6:53 p.m.	7/0.616
		1,877				6:50 p.m.	19/0.374
		1,885				18.66	41/0.254
		1,894				18.81	105/.160
16	50.82	1,291	2,583	0.00 2029	1,309	11.64	1/1,291
		1,464				11.67	7/0.488
		1,502				11.83	26/0.254
		1,483				11:65	65/.160
18	40.3	1,024	1,624	0.001275	0.8226	7,321	1/1,024
		1,192				7,434	7/0.390
		1,178				7,280	16/0.254
		1,212				7,540	34/.180
		1,163				7,160	41/.160
20	30	0.8118	1,021	0.0008019	0.5174	4.60	1/0.813
		0.9600				4.70	7/0.310
		0.9421				4.65	21/.180
		0.9305				4.54	26/.160
22	25:35	0.6439	624.6	0.0005047	0.3256	2,895	1/0.645
		0.7650				3,186	7/0.254
		0.7524				2,970	17/.160
24	20.1	0.5106	404	0.0003173	0.2047	1,820	1/0.511
		0.6000				1,060	7/0.200
		0.60525				1,920	11/0.160
26	15.94	0.40490	254.1	0.0001996	0.1288	1,145	1/0.404
		0.47400				1,223	7/0.160
28	12.64	0.32110	159.8	0.0001255	0.08097	0.7198	1/0.322
		0.38100				0.7903	7/0.127
30	10.03	0.25480	100.6	0.0007901	0.05097	0.4531	1/0.254
		0.30000				0.4900	7/0.100
32	7,950	0. 2091 0	63.20	0.00004964	0.03203	0.2847	7/0.080
34	6,305	0.16010	39.75	0.00003122	0.0 2014	0.1790	1/0.161
36	5	0.12700	25	0.00001963	0.01267	0.1126	1/0.128
38	3,965	0. 1007	15.72	0.00001235	0.007968	0.07084	1/0.102
40	3,145	0.07987	9,891	0.000007768	0.00 2012	0.04456	1/0.080