Wire Gauge Converter – AWG to mm/mm2 conversion

Many of our customers have been looking for an easy AWG To mm conversion tool so we’ve made one.

• What is AWG?
• How to convert AWG to mm/mm2
• AWG to mm/mm2 conversion chart

What is AWG?

The AWG – American Wire Gauge – is used as a standard method denoting wire diameter, measuring the diameter of the conductor (the bare wire) with the insulation removed. AWG is sometimes also known as Brown and Sharpe (B&S) Wire Gauge.

The “gauge” is related to the diameter of the wire.

larger “gauge” -> smaller diameter and thinner wire.

How to convert AWG to mm

When calclating AWG from diameter or cross sectional area, the diameter and cross sectional area are rounded to the nearest AWG equivalent values.

d_{n (mm)} = 0.127 mm × 92^(36-n)/39

A_{n (mm}2₎ = (π/4)×d_n²= 0.012668 mm² × 92^(36-n)/19.5

AWG to mm conversion chart

AWG #	Diameter (mm)	Diameter (inch)	Area (mm2)
0000 (4/0)	11.6840	0.4600	107.2193
000 (3/0)	10.4049	0.4096	85.0288
00 (2/0)	9.2658	0.3648	67.4309
0 (1/0)	8.2515	0.3249	53.4751
1	7.3481	0.2893	42.4077
2	6.5437	0.2576	33.6308
3	5.8273	0.2294	26.6705
4	5.1894	0.2043	21.1506
5	4.6213	0.1819	16.7732
6	4.1154	0.1620	13.3018
7	3.6649	0.1443	10.5488
8	3.2636	0.1285	8.3656
9	2.9064	0.1144	6.6342
10	2.5882	0.1019	5.2612
11	2.3048	0.0907	4.1723
12	2.0525	0.0808	3.3088
13	1.8278	0.0720	2.6240
14	1.6277	0.0641	2.0809
15	1.4495	0.0571	1.6502
16	1.2908	0.0508	1.3087
17	1.1495	0.0453	1.0378
18	1.0237	0.0403	0.8230
19	0.9116	0.0359	0.6527
20	0.8118	0.0320	0.5176
21	0.7229	0.0285	0.4105
22	0.6438	0.0253	0.3255
23	0.5733	0.0226	0.2582
24	0.5106	0.0201	0.2047
25	0.4547	0.0179	0.1624
26	0.4049	0.0159	0.1288
27	0.3606	0.0142	0.1021
28	0.3211	0.0126	0.0810
29	0.2859	0.0113	0.0642
30	0.2546	0.0100	0.0509
31	0.2268	0.0089	0.0404
32	0.2019	0.0080	0.0320
33	0.1798	0.0071	0.0254
34	0.1601	0.0063	0.0201
35	0.1426	0.0056	0.0160
36	0.1270	0.0050	0.0127
37	0.1131	0.0045	0.0100
38	0.1007	0.0040	0.0080
39	0.0897	0.0035	0.0063
40	0.0799	0.0031	0.0050

Things To Remember:

Wire Gauges run low to high – this means that the smaller a gauge number, the larger it is in mm. Conversely, a large number in AWG equates to a very small number of mm.
AWG sizes do not fit perfectly into mm or inches, so you may need to round up or down when safe to do so.
Cable sizes (including AWG) refers to the size of the conductor, not the total thickness of the cable including sheathing etc.
Do not confuse AWG (American Wire Gauge) with SWG (Standard Wire Gauge, the now largely redundant British Imperial standard which was superseded by mm.) as they are not equal. Always double-check to make sure you are buying the correct thickness of wire or cable.