AWG 28 Wire
Diameter 0.0126″
Millimeters 0.320 mm
Cross-section 159 cmil
mm² 0.0804
Nominal bare-conductor dimensions per ASTM B258. AWG is geometric: d = 0.005 × 92(36−n)/39 in with n = 28; 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 28 |
|---|---|---|---|
| 26 | 0.0159″ | 0.404 | +0.0033″ |
| 27 | 0.0142″ | 0.361 | +0.0016″ |
| 28 | 0.0126″ | 0.320 | — |
| 29 | 0.0113″ | 0.287 | −0.0013″ |
| 30 | 0.0100″ | 0.254 | −0.0026″ |
Measuring sheet metal, not wire? Sheet uses a different gauge scale — see 28 gauge sheet (steel: 0.0149″).