Determine correct AWG wire size using NEC ampacity guidance
Calculate voltage drop over distance for copper and aluminum wire.
The correct gauge depends on the current (Amps) the wire must carry and the distance (voltage drop). Heavier loads and longer distances require thicker wires (lower AWG number).
The NEC recommends a maximum voltage drop of 3% for branch circuits and 5% for feeder + branch combined to ensure equipment runs efficiently.
Yes! In guest mode, you can export your calculations to JSON format. Sign in is required for PDF and CSV export. Click the export button to download your results. This is perfect for record-keeping, sharing with others, or importing into other tools.
Yes! Your calculation history is automatically saved. Guest users can save up to 50 calculations per workspace locally. Sign in for free to save up to 100 calculations per workspace, with access from any device when logged in.
Absolutely! The Wire Gauge Calculator is completely free with no sign-up required. Create a free account to unlock additional features like more calculation history, multiple workspaces, and the ability to access your saved data from any device.
CalcTrail is a comprehensive free online calculator platform offering a comprehensive collection of specialized calculators for finance, health, academics, engineering, AI tools, and more. All calculators are free to use with no sign-up required. Create an account to save your work, access unlimited calculation history, workspace management, and custom variables.
This calculator is part of CalcTrail's collection of professional-grade tools designed for students, professionals, and anyone who needs accurate calculations. Export your results to PDF, JSON, or CSV formats. All calculations are performed client-side for privacy and speed.
Browse all calculators on CalcTrail to discover more tools for your needs.