Table
SWG vs AWG vs mm Comparison
SWG vs AWG vs mm Comparison reference with assumptions and boundary notes.
Reference boundary
Gauge comparison only. It does not identify a listed Canadian conductor product or approve a conductor for installation.
Reference table
Compare selected SWG and AWG wire gauge labels by approximate bare diameter.
| Gauge label | AWG diameter (mm) | SWG diameter (mm) | Note |
|---|---|---|---|
| 18 | 1.024 | 1.219 | Different gauge systems; do not interchange labels |
| 16 | 1.291 | 1.626 | SWG is larger than AWG at this number |
| 14 | 1.628 | 2.032 | Use as a dimensional comparison only |
| 12 | 2.053 | 2.642 | Product markings govern actual conductor identity |
| 10 | 2.588 | 3.251 | Gauge number alone is not enough for selection |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.