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About This Tool
The Wire Gauge Calculator provides a comprehensive reference table for American Wire Gauge (AWG) sizes. Look up any gauge from 0000 (4/0) to 40 and see its diameter, cross-sectional area, resistance per 1000 feet, and maximum ampacity for copper conductors.
Use the search function to jump directly to a specific gauge or browse the full table. The ampacity values are based on standard copper conductor ratings at 60°C in free air.
Invaluable for electricians, hobbyists, and engineers selecting the right wire size for their projects.