Wire cross-sections shown at relative scale — higher AWG = smaller wire
AWG Wire Gauge Reference Table
| AWG | Diameter (mm) | Diameter (mil) | Area (mm²) | Area (kcmil) | Max Current (A) | Resistance (mΩ/m) |
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AWG to mm Conversion Guide
AWG (American Wire Gauge) is a standardised system for wire diameters used in North America. The gauge number is inversely proportional to the wire diameter — a higher AWG number means a thinner wire. AWG 36 is approximately 0.127 mm in diameter, while AWG 0000 (4/0) is 11.68 mm.
In PCB design, trace widths are often specified in mils (thousandths of an inch). 1 mil = 25.4 µm. A standard 10-mil trace is 0.254 mm wide.
Key Formulas
Diameter (mm) = 0.127 × 92^((36−AWG)/39)1 mil = 0.0254 mm1 cmil = π/4 mil²(area of a 1-mil diameter circle)Area (mm²) = π/4 × (diameter_mm)²