VoltCheck24 Engineering Calculator

AWG to mm2 Calculator and Wire Size Conversion Table

Convert common AWG wire gauges to approximate mm2 cross-sectional area and compare resistance, ampacity, and practical use cases.

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How to use this calculator

  1. Collect the values below from the equipment nameplate, data sheet, or field measurement.
  2. Enter values using one consistent unit system and use worst-case operating conditions.
  3. Review the result, margin, and engineering note before selecting hardware.
  4. Cross-check the result with the related calculator and save the review for your project record.

Input checklist

Example field question

Use this calculator when a design review or site issue requires a quick engineering check before a detailed manufacturer selection.

Common mistakes to avoid

Do not mix nominal values with measured worst-case values. Keep units consistent and include cable, temperature, duty, and derating assumptions where applicable.

Standards and validation

Review the result against local codes, IEC/NEC/NFPA/ISO practices when applicable, project specifications, and the latest manufacturer data sheet.

Recommended workflow

Start with the primary calculation, then use the related tool to check the next design dependency. Save or print the result only after the assumptions and worst-case conditions are confirmed.

Start with the primary inputsCheck the related dependency

Formula and Inputs

AWG conversion compares standard gauge numbers with approximate conductor cross-sectional area in square millimeters and resistance per length.

Industrial Use Cases

Use this table when switching between US AWG specifications and IEC or metric mm2 cable sizes for international projects.

Engineering Note

AWG-to-mm2 values are approximate nominal references. Always use manufacturer data for exact conductor construction, resistance, insulation, and current rating.

FAQ

Is AWG 12 bigger than AWG 14?

Yes. In AWG, a smaller number is a larger wire. AWG 12 has a larger conductor area than AWG 14.

Is mm2 the same as SQ?

In many industrial contexts, SQ informally refers to conductor cross-sectional area in square millimeters, but final documentation should use the project standard notation.

Preliminary engineering reference only. Confirm final selections against current standards, project specifications, and manufacturer data.