Wire Gauge Converter — AWG to mm², Diameter & Current Rating
Convert American Wire Gauge (AWG) to square millimeters (mm²) and diameter, with ampacity reference for common applications. Essential for extension cords and power tools.
Enter an AWG number (e.g. 12)
Or enter a cross-section in mm²
Wire gauge result
12 AWG ≈ 3.31 mm²
Diameter
2.053 mm
Diameter (in)
0.0808
Chassis wiring
41 A
Power transmission (60°C)
20 A
| AWG | mm² | Diameter (mm) | Diameter (in) | Chassis wiring | Power transmission (60°C) |
|---|---|---|---|---|---|
| 4/0 | 107.22 | 11.684 | 0.4600 | 380 | 195 |
| 3/0 | 85.03 | 10.405 | 0.4096 | 328 | 165 |
| 2/0 | 67.43 | 9.266 | 0.3648 | 283 | 145 |
| 1/0 | 53.48 | 8.251 | 0.3249 | 245 | 125 |
| 1 | 42.41 | 7.348 | 0.2893 | 211 | 110 |
| 2 | 33.63 | 6.544 | 0.2576 | 181 | 95 |
| 3 | 26.67 | 5.827 | 0.2294 | 158 | 85 |
| 4 | 21.15 | 5.189 | 0.2043 | 135 | 70 |
| 5 | 16.77 | 4.621 | 0.1819 | 118 | 60 |
| 6 | 13.30 | 4.115 | 0.1620 | 101 | 55 |
| 7 | 10.55 | 3.665 | 0.1443 | 89 | 50 |
| 8 | 8.37 | 3.264 | 0.1285 | 73 | 40 |
| 9 | 6.63 | 2.906 | 0.1144 | 64 | 35 |
| 10 | 5.26 | 2.588 | 0.1019 | 55 | 30 |
| 11 | 4.17 | 2.305 | 0.0907 | 47 | 25 |
| 12 | 3.31 | 2.053 | 0.0808 | 41 | 20 |
| 13 | 2.62 | 1.828 | 0.0720 | 35 | 15 |
| 14 | 2.08 | 1.628 | 0.0641 | 32 | 15 |
| 15 | 1.65 | 1.450 | 0.0571 | 28 | — |
| 16 | 1.31 | 1.291 | 0.0508 | 22 | — |
| 17 | 1.04 | 1.150 | 0.0453 | 19 | — |
| 18 | 0.82 | 1.024 | 0.0403 | 16 | — |
| 19 | 0.65 | 0.912 | 0.0359 | 14 | — |
| 20 | 0.52 | 0.812 | 0.0320 | 11 | — |
| 21 | 0.41 | 0.723 | 0.0285 | — | — |
| 22 | 0.33 | 0.644 | 0.0253 | — | — |
| 23 | 0.26 | 0.573 | 0.0226 | — | — |
| 24 | 0.20 | 0.511 | 0.0201 | — | — |
| 25 | 0.16 | 0.455 | 0.0179 | — | — |
| 26 | 0.13 | 0.405 | 0.0159 | — | — |
| 27 | 0.10 | 0.361 | 0.0142 | — | — |
| 28 | 0.08 | 0.321 | 0.0126 | — | — |
| 29 | 0.06 | 0.286 | 0.0113 | — | — |
| 30 | 0.05 | 0.255 | 0.0100 | — | — |
| 31 | 0.04 | 0.227 | 0.0089 | — | — |
| 32 | 0.03 | 0.202 | 0.0080 | — | — |
| 33 | 0.03 | 0.180 | 0.0071 | — | — |
| 34 | 0.02 | 0.160 | 0.0063 | — | — |
| 35 | 0.02 | 0.143 | 0.0056 | — | — |
| 36 | 0.01 | 0.127 | 0.0050 | — | — |
| 37 | 0.01 | 0.113 | 0.0045 | — | — |
| 38 | 0.01 | 0.101 | 0.0040 | — | — |
| 39 | 0.01 | 0.090 | 0.0035 | — | — |
| 40 | 0.01 | 0.080 | 0.0031 | — | — |
Frequently Asked Questions
Are these tools free to use?＋
Yes, all calculators and converters on this page are completely free, with no registration or download required.
Are the conversion results accurate?＋
All calculations use standard international conversion factors and are accurate to 6 decimal places where relevant.
Can I use these tools on my phone?＋
Yes, every tool is fully responsive and works on mobile, tablet and desktop browsers.
Do you sell the tools mentioned on these pages?＋
Yes! We are a professional B2B supplier of power tools, hand tools, garden tools and agricultural machinery. Contact us for a factory-direct quote.
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Do you sell the tools mentioned on these pages?
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