AWG Conversion Table

AWG(American Wire Gauge)其實是美制電線標準的簡稱，AWG值是導線厚度（以英寸計）的函數。下表將列取AWG與公制、英制單位的對照表。

AWG	Diameter		Turns of wire (no insulation)		Area		amps*
	(inch)	(mm)	(per in)	(per cm)	(kcmil)	(mm2)	(A)
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	130
1	0.2893	7.348	3.46	1.36	83.7	42.4	117
2	0.2576	6.544	3.88	1.53	66.4	33.6	111
3	0.2294	5.827	4.36	1.72	52.6	26.7	101
4	0.2043	5.189	4.89	1.93	41.7	21.2	78
5	0.1819	4.621	5.50	2.16	33.1	16.8	72
6	0.1620	4.115	6.17	2.43	26.3	13.3	62
7	0.1443	3.665	6.93	2.73	20.8	10.5	58
8	0.1285	3.264	7.78	3.06	16.5	8.37	49
9	0.1144	2.906	8.74	3.44	13.1	6.63	42
10	0.1019	2.588	9.81	3.86	10.4	5.26	34
11	0.0907	2.305	11.0	4.34	8.23	4.17	31
12	0.0808	2.053	12.4	4.87	6.53	3.31	27
13	0.0720	1.828	13.9	5.47	5.18	2.62	23
14	0.0641	1.628	15.6	6.14	4.11	2.08	21
15	0.0571	1.450	17.5	6.90	3.26	1.65	19
16	0.0508	1.291	19.7	7.75	2.58	1.31	15
17	0.0453	1.150	22.1	8.70	2.05	1.04	13
18	0.0403	1.024	24.8	9.77	1.62	0.823	11
19	0.0359	0.912	27.9	11.0	1.29	0.653	10
20	0.0320	0.812	31.3	12.3	1.02	0.518	8
21	0.0285	0.723	35.1	13.8	0.810	0.410	6
22	0.0253	0.644	39.5	15.5	0.642	0.326	5
23	0.0226	0.573	44.3	17.4	0.509	0.258	4
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	/

*Maximum amps for twisted wire (copper)

According to the difference number of AWG, the ampacity would be difference. The lower number of AWG, the higher ampacity.

The following chart is a guideline of PVC-insulated multicore copper wire ampacity under ambient temperature of 30°C.

Notice that the above results is for reference only, actual ampacity value depends on difference factors.Including voltage variation, number of core, material of conductor, purity of conductor, insulation temperature limit, thickness, thermal conductivity, and air convection and temperature should all be taken into account.