AWG to mm² Wire Gauge Converter

Convert American Wire Gauge (AWG) sizes to mm² cross-section and diameter, and find the nearest AWG for a metric wire size.

AWG → mm²

Area	`3.309 mm²` (6,529.9 kcmil)
Diameter	`2.053 mm` (0.08081 in)
Resistance (copper, 20 °C)	5.211 Ω/km

mm² → AWG

Nearest AWG	`13 AWG` (2.624 mm²)
Smallest AWG ≥ 2.5 mm²	13 AWG (2.624 mm²)

Reference table

AWG	Diameter (mm)	Area (mm²)	Ω/km (Cu)
4/0	11.68	107.2	0.1608
3/0	10.4	85.03	0.2028
2/0	9.266	67.43	0.2557
1/0	8.251	53.48	0.3224
1	7.348	42.41	0.4066
2	6.544	33.63	0.5127
3	5.827	26.67	0.6464
4	5.189	21.15	0.8152
5	4.621	16.77	1.028
6	4.115	13.3	1.296
7	3.665	10.55	1.634
8	3.264	8.366	2.061
9	2.906	6.634	2.599
10	2.588	5.261	3.277
11	2.305	4.172	4.132
12	2.053	3.309	5.211
13	1.828	2.624	6.571
14	1.628	2.081	8.285
15	1.45	1.65	10.45
16	1.291	1.309	13.17
17	1.15	1.038	16.61
18	1.024	0.823	20.95
19	0.9116	0.6527	26.41
20	0.8118	0.5176	33.31
21	0.7229	0.4105	42
22	0.6438	0.3255	52.96
23	0.5733	0.2582	66.78
24	0.5106	0.2047	84.21
25	0.4547	0.1624	106.2
26	0.4049	0.1288	133.9
27	0.3606	0.1021	168.9
28	0.3211	0.08098	212.9
29	0.2859	0.06422	268.5
30	0.2546	0.05093	338.5
31	0.2268	0.04039	426.9
32	0.2019	0.03203	538.3
33	0.1798	0.0254	678.8
34	0.1601	0.02014	856.0
35	0.1426	0.01597	1,079.3
36	0.127	0.01267	1,361.0
37	0.1131	0.01005	1,716.2
38	0.1007	0.007967	2,164.1
39	0.08969	0.006318	2,728.9
40	0.07987	0.00501	3,441.1

d = 0.127 mm × 92^{(36 − n) / 39}, where 1/0 = 0, 2/0 = −1, 3/0 = −2 and 4/0 = −3.

About this AWG to mm² wire gauge converter

Convert American Wire Gauge (AWG) sizes to metric cross-sectional area in mm² and diameter in mm, or find the nearest AWG for a metric cable size. Useful when working with US and IEC wiring standards side by side.

How to use the AWG to mm² Wire Gauge Converter

Select an AWG size or enter a mm² value.
Read the equivalent area and diameter.

Example

12 AWG  →  3.31 mm² (2.05 mm diameter)

Frequently asked questions

Is a higher AWG number a thicker wire?

No. Higher AWG numbers mean thinner wires; every 6 gauges roughly halves the diameter.

What is the closest metric size to 10 AWG?

10 AWG is 5.26 mm², so 6 mm² is the nearest standard metric size above it.

Is my data safe?

Yes. The tool runs entirely in your browser using WebAssembly. Nothing you type or upload is sent to a server, logged or stored.

Is it free?

Yes, completely free with no sign-up, no limits and no watermarks. It also works offline once the page has loaded.