Wire

AWG 18 to mm²

Convert AWG 18 using the free online wire gauge calculator. Get the cross-section in mm², diameter, and copper resistance. 100% in your browser.

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Try an example:

AWG	Diameter (mm)	Area (mm²)	Ω/km (Cu, 20°C)
0000 (4/0)	11.684	107.2	0.16
000 (3/0)	10.405	85.01	0.2
00 (2/0)	9.266	67.43	0.26
0 (1/0)	8.252	53.49	0.32
1	7.348	42.41	0.41
2	6.544	33.62	0.51
4	5.189	21.15	0.82
6	4.115	13.3	1.3
8	3.264	8.366	2.06
10	2.588	5.261	3.28
12	2.053	3.309	5.21
14	1.628	2.081	8.29
16	1.291	1.309	13.18
18	1.024	0.823	20.95
20	0.812	0.518	33.3
22	0.644	0.326	52.96
24	0.511	0.205	84.22
26	0.405	0.129	134
28	0.321	0.081	213

AWG	Diameter (mm)	Area (mm²)	Ω/km (Cu, 20°C)
0000 (4/0)	11.684	107.2	0.16
000 (3/0)	10.405	85.01	0.2
00 (2/0)	9.266	67.43	0.26
0 (1/0)	8.252	53.49	0.32
1	7.348	42.41	0.41
2	6.544	33.62	0.51
4	5.189	21.15	0.82
6	4.115	13.3	1.3
8	3.264	8.366	2.06
10	2.588	5.261	3.28
12	2.053	3.309	5.21
14	1.628	2.081	8.29
16	1.291	1.309	13.18
18	1.024	0.823	20.95
20	0.812	0.518	33.3
22	0.644	0.326	52.96
24	0.511	0.205	84.22
26	0.405	0.129	134
28	0.321	0.081	213