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.