Wire Gauge AWG ↔ mm²
This chart converts American Wire Gauge to metric conductor diameter and cross-sectional area. Find the AWG number, read across for diameter and area, then use the nearby common JIS sizes in the note as a reference before selecting the actual cable.
AWG → diameter & area| AWG | Diameter (mm) | Cross-section (mm²) |
|---|
| 24 | 0.51 | 0.20 |
| 22 | 0.64 | 0.33 |
| 20 | 0.81 | 0.52 |
| 18 | 1.02 | 0.82 |
| 16 | 1.29 | 1.31 |
| 14 | 1.63 | 2.08 |
| 12 | 2.05 | 3.31 |
| 10 | 2.59 | 5.26 |
| 8 | 3.26 | 8.37 |
| 6 | 4.12 | 13.30 |
| 4 | 5.19 | 21.15 |
| 2 | 6.54 | 33.63 |
| 1 | 7.35 | 42.41 |
| 1/0 | 8.25 | 53.48 |
| 2/0 | 9.27 | 67.43 |
| 3/0 | 10.40 | 85.03 |
| 4/0 | 11.68 | 107.22 |
Values follow the AWG definition (diameter d = 0.127 mm × 92^((36−n)/39)); the area is for a solid conductor — real stranded wire deviates slightly by construction. Nearest common JIS size (reference): 14 AWG ≈ 2 sq · 12 ≈ 3.5 · 10 ≈ 5.5 · 8 ≈ 8 · 6 ≈ 14 · 4 ≈ 22 · 2 ≈ 38 sq.
Frequently asked questions
Does a smaller AWG number mean a smaller wire?
No. In AWG, a lower gauge number means a larger diameter and area; sizes after AWG 1 continue as 1/0, 2/0 and so on. Read the chart row to avoid reversing the relationship.
Does the listed area apply directly to stranded wire?
The chart follows the AWG definition for a solid conductor. Actual stranded construction can differ slightly; use the AWG row for conversion, then verify the cable datasheet.
Can I directly replace an AWG wire with the nearest JIS size?
Not from area alone. Use the chart to find a nearby size, then verify ampacity, temperature, installation, insulation and termination requirements.
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