MagicKit.ai

Wire Size Calculator

Calculate the correct wire gauge size for electrical projects. Enter amperage, voltage, and distance to find the proper AWG wire size.

How to Calculate Wire Size

  1. 1 Enter current in amps and system voltage
  2. 2 Input wire run distance (one-way)
  3. 3 Select wire type (copper or aluminum)
  4. 4 Set maximum acceptable voltage drop percentage
  5. 5 Click Calculate to see recommended wire gauge
  6. 6 Review ampacity and actual voltage drop

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Last updated: January 15, 2026 · v2.1