AWG 22 Wire
Diameter 0.0253″
Millimeters 0.643 mm
Cross-section 640 cmil
mm² 0.3243
Nominal bare-conductor dimensions per ASTM B258. AWG is geometric: d = 0.005 × 92(36−n)/39 in with n = 22; 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 22 |
|---|---|---|---|
| 20 | 0.0320″ | 0.813 | +0.0067″ |
| 21 | 0.0285″ | 0.724 | +0.0032″ |
| 22 | 0.0253″ | 0.643 | — |
| 23 | 0.0226″ | 0.574 | −0.0027″ |
| 24 | 0.0201″ | 0.511 | −0.0052″ |
Measuring sheet metal, not wire? Sheet uses a different gauge scale — see 22 gauge sheet (steel: 0.0299″).