AWG 8 Wire
Diameter 0.1285″
Millimeters 3.264 mm
Cross-section 16,512 cmil
mm² 8.37
Nominal bare-conductor dimensions per ASTM B258. AWG is geometric: d = 0.005 × 92(36−n)/39 in with n = 8; area is derived from the diameter. Ampacity depends on insulation, bundling, and the electrical code in force — it is a property of the installation, not the gauge.
Neighboring gauges
| AWG | Diameter | mm | vs AWG 8 |
|---|---|---|---|
| 6 | 0.1620″ | 4.115 | +0.0335″ |
| 7 | 0.1443″ | 3.665 | +0.0158″ |
| 8 | 0.1285″ | 3.264 | — |
| 9 | 0.1144″ | 2.906 | −0.0141″ |
| 10 | 0.1019″ | 2.588 | −0.0266″ |
Measuring sheet metal, not wire? Sheet uses a different gauge scale — see 8 gauge sheet (steel: 0.1644″).