12 AWG: this page
- Input
- 12 AWG
- Expected output
- 3.31 mm2
2.053 mm diameter, 5.21 Ω/km.
Carregando ferramenta… / Loading tool…
12 awg to mm2
If you searched "12 AWG to mm²" to decide which cable to buy or to read an American catalog, the answer is 3.31 mm². The tool below opens at 12 AWG and shows the area, diameter, copper resistance, the nearest standard metric size and the neighboring gauges, so you can see where 12 sits on the scale.
2.053 mm diameter, 5.21 Ω/km.
2.588 mm diameter, 3.277 Ω/km.
1.628 mm diameter, 8.286 Ω/km.
1.291 mm diameter, 13.17 Ω/km.
3.264 mm diameter, 2.061 Ω/km.
1.024 mm diameter, 20.95 Ω/km.
12 AWG has a cross-section of 3.31 mm² and a diameter of 2.053 mm. Copper resistance is about 5.21 Ω per kilometer at 20 °C.
3.31 mm², with a diameter of 2.053 mm. The result comes from the AWG formula, not from a rounded table.
Not exactly. 12 AWG is 3.31 mm² and standard 4 mm² has about 20% more copper. It is the nearest common metric size above 12 AWG, but AWG and mm² have no exact equivalence.
In solid copper at 20 °C, 5.211 Ω per kilometer, or about 5.2 mΩ per meter. Over 10 m of wire that is 0.052 Ω.
This tool does not answer that, on purpose. Current capacity depends on the applicable code, the insulation type, the temperature and how the cable is installed. Consult your project's standard.
AWG and metric sizes are different scales: there is no exact equivalence. For installation cable, your project's cross-section and code are what count.
The math runs in your browser; no value is sent to a server. The tool does not give current capacity (ampacity), which depends on the code and the installation.