Reference

Wire Gauge Conversion Chart

AWG to mm² conversion with diameter and ampacity. Reference table for all standard wire gauges.

AWG	mm²	Ø mm	Ø inch	Max amps	Typical use
0000 (4/0)	107.2	11.68	0.460	380A	Service entrance, heavy industrial
000 (3/0)	85.0	10.40	0.410	328A	Service entrance
00 (2/0)	67.4	9.27	0.365	283A	Large feeder cables
0 (1/0)	53.5	8.25	0.325	245A	Feeder cables, sub-panels
1	42.4	7.35	0.289	211A	Large sub-panel feeders
2	33.6	6.54	0.258	181A	Sub-panel feeders
4	21.2	5.19	0.204	135A	Feeder circuits, ranges
6	13.3	4.11	0.162	101A	Large appliances, A/C
8	8.37	3.26	0.128	73A	Ranges, dryers, 40A circuits
10	5.26	2.59	0.102	55A	Dryers, 30A circuits, A/C
12	3.31	2.05	0.081	41A	20A circuits, kitchen, bathroom
14	2.08	1.63	0.064	32A	15A circuits, lighting, outlets
16	1.31	1.29	0.051	22A	Extension cords, light fixtures
18	0.823	1.02	0.040	16A	Low-voltage lighting, bell wire
20	0.518	0.812	0.032	11A	Electronics, thermostats
22	0.326	0.644	0.025	7A	Signal wiring, sensors
24	0.205	0.511	0.020	3.5A	Data cables, Ethernet
26	0.129	0.405	0.016	2.2A	Patch cables, ribbon cables

Ampacity values are approximate for chassis wiring at 30°C. Actual ratings depend on insulation type, installation method, and local code.

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