Both AWG and mm are basically a measure of wire diameter (thickness). AWG or American Wire Gauge is a diameter unit used predominantly in the US, while a metric mm (millimeters) is used around the world. In many cases, you will need to convert AWG to mm like this:

In theory, you convert AWG gauge to mm using this somewhat complex AWG to mm formula:
In practice, we prefer to use a simple AWG to mm chart. Here is the full chart for all AWG gauge wires to mm:
AWG To mm Chart
AWG Wire Gauge: | mm (Diameter): |
0000 (4/0) AWG | 11.684 mm |
000 (3/0) AWG | 10.405 mm |
00 (2/0) AWG | 9.266 mm |
0 (1/0) AWG | 8.251 mm |
1 AWG | 7.348 mm |
2 AWG | 6.544 mm |
3 AWG | 5.827 mm |
4 AWG | 5.189 mm |
5 AWG | 4.621 mm |
6 AWG | 4.115 mm |
7 AWG | 3.665 mm |
8 AWG | 3.264 mm |
9 AWG | 2.906 mm |
10 AWG | 2.588 mm |
11 AWG | 2.305 mm |
12 AWG | 2.053 mm |
13 AWG | 1.828 mm |
14 AWG | 1.628 mm |
15 AWG | 1.450 mm |
16 AWG | 1.291 mm |
17 AWG | 1.150 mm |
18 AWG | 1.024 mm |
19 AWG | 0.912 mm |
20 AWG | 0.812 mm |
21 AWG | 0.723 mm |
22 AWG | 0.644 mm |
23 AWG | 0.573 mm |
24 AWG | 0.511 mm |
25 AWG | 0.455 mm |
26 AWG | 0.405 mm |
27 AWG | 0.361 mm |
28 AWG | 0.321 mm |
29 AWG | 0.286 mm |
30 AWG | 0.255 mm |
31 AWG | 0.227 mm |
32 AWG | 0.202 mm |
33 AWG | 0.180 mm |
34 AWG | 0.160 mm |
35 AWG | 0.143 mm |
36 AWG | 0.127 mm |
37 AWG | 0.113 mm |
38 AWG | 0.101 mm |
39 AWG | 0.0897 mm |
40 AWG | 0.0799 mm |
This chart is simple to use.
Example: How many mm is an 8 AWG wire? 8 AWG wire is 3.264 mm.
You can do this for literally AWG wire you need to convert to mm.
You can check similar charts for:
- AWG to mm2 conversion.
- AWG wire ampacity chart where you can see how many amps can a certain AWG wire handle.
Finally an actual formula! Trying to figure out the AWG of the 0.007mm diameter wire I use for nanosoldering. According to this formula, 61 AWG. Thanks.
Hi there, yes, the formula is fairly complex, that’s why you will only find direct AWG to mm conversions. In many cases, however, the equation is useful, that’s why did include it.