3 AWG to mm² – Wire Size & Diameter
3 AWG = 26.67 mm²
3 AWG solid wire has a cross-section of 26.67 mm² and a diameter of 5.827 mm (0.2294 in).
Step by step
- Diameter: d = 0.127 × 92^((36 − 3)/39) = 5.8273 mm.
- Area: π/4 × d² = 26.6705 mm².
3 AWG is a mid-size gauge for appliance and feeder circuits.
Details
- Area
- 26.67 mm²
- Diameter
- 5.827 mm (0.2294 in)
- Area in kcmil
- 52.63
- Nearest metric size
- 25 mm²
- Copper resistance
- 0.646 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 3 AWG in mm²?
26.67 mm².
What is the diameter of 3 AWG wire?
5.827 mm (solid conductor).
What metric wire replaces 3 AWG?
Use the next metric size up with at least 26.67 mm².
Is stranded wire the same size?
Stranded wire of the same gauge has the same copper area but a slightly larger overall diameter.