1/0 AWG to mm² – Wire Size & Diameter
1/0 AWG = 53.475 mm²
1/0 AWG solid wire has a cross-section of 53.475 mm² and a diameter of 8.251 mm (0.3249 in).
Step by step
- Diameter: d = 0.127 × 92^((36 − 0)/39) = 8.2515 mm.
- Area: π/4 × d² = 53.4751 mm².
1/0 AWG is a heavy gauge for feeders, service entrances, batteries and welding cables.
Details
- Area
- 53.475 mm²
- Diameter
- 8.251 mm (0.3249 in)
- Area in kcmil
- 105.53
- Nearest metric size
- 50 mm²
- Copper resistance
- 0.322 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 1/0 AWG in mm²?
53.475 mm².
What is the diameter of 1/0 AWG wire?
8.251 mm (solid conductor).
What metric wire replaces 1/0 AWG?
Use the next metric size up with at least 53.48 mm².
Is stranded wire the same size?
Stranded wire of the same gauge has the same copper area but a slightly larger overall diameter.