Wire Gauge Calculator

Find the correct wire gauge AWG for any current load.

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Guides & Reference

How It Works

Find the correct wire gauge AWG for any current load. Enter your values and press Calculate for instant results with a full formula breakdown.

Formula

AWG from NEC ampacity table

Quick Reference

Common calculations — results you can verify instantly.

20A circuit

NEC standard

12 AWG minimum

15A circuit

NEC standard

14 AWG minimum

30A circuit

NEC standard

10 AWG minimum

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