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EZFreeTools › Calculators › Wire Gauge Calculator

Wire Gauge Calculator

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Size wire by current, length, and voltage drop.

How to Use

  • Enter the system voltage, current draw, and one-way wire length.
  • Set your maximum acceptable voltage drop percentage (3% is standard).
  • The calculator recommends the smallest AWG gauge that meets the requirement.
  • Use "AWG Lookup" mode to see specs for a specific gauge.

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