Wire Gauge Converter
Diameter (mm)
1.6277mm
Diameter (inches)
0.0641in
Area (mm²)
2.0810mm²
Area (kcmil)
4.107kcmil
Resistance/km
8.286Ω/km
Ampacity (approx)
20A
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A complete wire gauge reference and converter covering AWG (American Wire Gauge) 4/0 through 40, SWG (Standard British Wire Gauge) 0–40, and metric diameter input. Wire Lookup mode: select an AWG gauge and instantly see diameter in mm and inches, cross-sectional area in mm² and kcmil, DC resistance per km at 20°C for annealed copper, and approximate NEC ampacity for 60°C insulation. SWG mode shows the corresponding British Standard diameter. Metric mode: enter any wire diameter in mm and find the nearest AWG equivalent. Full Table mode shows all AWG sizes in a sortable, searchable table. Data based on NIST wire tables and NEC 310 ampacity tables. All browser-based.
How to Use
- 1Choose Wire Lookup mode or Full Table mode
- 2In Lookup: select AWG, SWG, or Metric input type
- 3Select a gauge or enter a diameter in mm
- 4Read diameter, area, resistance, and ampacity instantly
- 5Click any field to copy the value
- 6Use Full Table to search and compare all AWG sizes
Features
- AWG 4/0 through AWG 40
- SWG (Standard British) lookup
- Metric mm diameter → nearest AWG
- Diameter in mm and inches
- Area in mm² and kcmil
- Resistance Ω/km (copper, 20°C)
- NEC ampacity ratings
- Searchable full comparison table
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