1 AWG to mm² – Wire Size & Diameter
1 AWG = 42.408 mm²
1 AWG solid wire has a cross-section of 42.408 mm² and a diameter of 7.348 mm (0.2893 in).
Step by step
- Diameter: d = 0.127 × 92^((36 − 1)/39) = 7.3481 mm.
- Area: π/4 × d² = 42.4077 mm².
1 AWG is a heavy gauge for feeders, service entrances, batteries and welding cables.
Details
- Area
- 42.408 mm²
- Diameter
- 7.348 mm (0.2893 in)
- Area in kcmil
- 83.69
- Nearest metric size
- 35 mm²
- Copper resistance
- 0.407 Ω/km
How it works
The American Wire Gauge system is logarithmic: smaller numbers mean thicker wire, every 6 gauges halve the diameter and every 3 gauges roughly halve the area. Metric wire is specified directly by cross-sectional area in mm², so the sizes never line up exactly. When substituting, choose a conductor with at least the same area, and always follow local electrical codes.
Nearby values
Related conversions
Frequently asked questions
What is 1 AWG in mm²?
42.408 mm².
What is the diameter of 1 AWG wire?
7.348 mm (solid conductor).
What metric wire replaces 1 AWG?
Use the next metric size up with at least 42.41 mm².
Is stranded wire the same size?
Stranded wire of the same gauge has the same copper area but a slightly larger overall diameter.