Standard metric wire sizes used internationally. Defined by IEC 60228, these sizes are specified in mm² (square millimeters) cross-sectional area. Used in Europe, Asia, Australia, and most countries outside North America.
| Size (mm²) | Diameter (mm) | ≈ AWG | Amps (Cu) | Amps (Al) | Ω/km (Cu) | kg/km (Cu) |
|---|---|---|---|---|---|---|
| 0.5 mm² | 0.798 | 20 | 3 | — | 34.48 | 4.48 |
| 0.75 mm² | 0.977 | 18 | 6 | — | 22.9867 | 6.72 |
| 1.0 mm² | 1.128 | 17 | 10 | — | 17.24 | 8.96 |
| 1.5 mm² | 1.382 | 15 | 14 | — | 11.4933 | 13.44 |
| 2.5 mm² | 1.784 | 13 | 20 | 16 | 6.896 | 22.4 |
| 4 mm² | 2.257 | 11 | 27 | 21 | 4.31 | 35.84 |
| 6 mm² | 2.764 | 9 | 34 | 27 | 2.8733 | 53.76 |
| 10 mm² | 3.568 | 7 | 46 | 36 | 1.724 | 89.6 |
| 16 mm² | 4.514 | 5 | 62 | 49 | 1.0775 | 143.36 |
| 25 mm² | 5.642 | 3 | 80 | 63 | 0.6896 | 224.0 |
| 35 mm² | 6.676 | 2 | 99 | 77 | 0.4926 | 313.6 |
| 50 mm² | 7.979 | 1/0 | 119 | 93 | 0.3448 | 448.0 |
| 70 mm² | 9.441 | 2/0 | 151 | 118 | 0.2463 | 627.2 |
| 95 mm² | 10.998 | 3/0 | 182 | 142 | 0.1815 | 851.2 |
| 120 mm² | 12.361 | 4/0 | 210 | 164 | 0.1437 | 1075.2 |
| 150 mm² | 13.82 | 4/0 | 240 | 189 | 0.1149 | 1344.0 |
| 185 mm² | 15.348 | 4/0 | 273 | 215 | 0.0932 | 1657.6 |
| 240 mm² | 17.481 | 4/0 | 320 | 252 | 0.0718 | 2150.4 |
| 300 mm² | 19.544 | 4/0 | 367 | 289 | 0.0575 | 2688.0 |