WIRE GAUGE CHARTS
9 wire in mm
Thickness: 2.91 mm diameter (0.114 inches), 6.63 mm² cross-section of solid copper.
Specifications
- Diameter
- 2.91 mm
- Diameter (imperial)
- 0.114 in
- Cross-section
- 6.63 mm²
- Area (kcmil)
- 13.1
- Copper resistance
- 0.792 Ω/1000 ft
- Copper resistance (metric)
- 2.60 Ω/km
- Copper weight
- 59.4 g/m
- Free-air rating (typical)
- 163 A
Nearest metric sizes
6.63 mm² does not match a standard metric cable size exactly. The closest conventional cross-sections are4 mm², 6 mm² and 10 mm²— engineers round this wire up (larger cross-section) for ampacity, or accept the raw equality for signal work.
One gauge away:10 · thinner8 · thickerFull chart →
Frequently asked questions
Is 9 gauge wire thick or thin?
9 gauge wire is 2.91 mm in diameter. On the AWG scale a lower number means a thicker wire, so 9 AWG sits in the mid-power range used for appliances and small feeders.
What diameter is 9 wire in millimeters?
9 gauge wire is 2.91 mm (0.114 in) in diameter, with a solid-conductor cross-section of 6.63 mm².