What is the AWG ↔ mm² Cable Size Converter with Ampacity?

This AWG ↔ mm² Cable Size Converter is a tool designed to:

1. Convert wire sizes between the AWG (American Wire Gauge) system and the metric system (mm² for cross-sectional area).
2. Provide an approximate maximum current (ampacity) for each wire size based on typical copper conductors, insulation (like THHN), and installation conditions.

It simplifies the task of determining equivalent wire sizes between two widely used standards and gives users a reference for the amount of current the wire can safely carry under normal conditions.

Features of the Converter

1. Two-Way Conversion:
   • AWG to mm²: Input a wire size in AWG, and the converter provides the equivalent cross-sectional area in mm².
   • mm² to AWG: Input a wire size in mm², and the converter provides the approximate equivalent AWG size.
2. Approximate Ampacity:
   • After converting, the tool displays the maximum current (ampacity) the wire can carry under typical conditions, based on widely accepted tables (e.g., NEC guidelines for copper conductors with THHN insulation).
3. User-Friendly Interface:
   • Simple inputs for AWG or mm².
   • Results include wire size conversion and ampacity for quick reference.

How to Use the Converter

1. Convert AWG to mm²:
   • Enter the wire size in AWG in the "AWG to mm²" input field.
   • Click the "AWG → mm²" button.
   • The tool will display:
     • The equivalent cross-sectional area in mm².
     • The approximate ampacity (in amps) for the wire.
2. Convert mm² to AWG:
   • Enter the wire size in mm² in the "mm² to AWG" input field.
   • Click the "mm² → AWG" button.
   • The tool will display:
     • The closest AWG size.
     • The approximate ampacity (in amps) for the wire.

Example Use Cases

Case 1: AWG to mm²

• Input: AWG = 1
• Output:
  • Equivalent size = 42.4 mm²
  • Approximate ampacity = 130 A

Case 2: mm² to AWG

• Input: mm² = 50
• Output:
  • Equivalent size = AWG 0 (1/0)
  • Approximate ampacity = 150 A

Important Notes

1. Ampacity Values:
   • The ampacity values are approximate and based on common conditions:
     • Copper conductors with THHN insulation.
     • 75–90°C insulation rating.
     • Installed in conduit with moderate ambient temperature.
   • Actual ampacity may vary depending on:
     • Insulation type and temperature rating.
     • Installation method (e.g., buried, in conduit, or in open air).
     • Ambient temperature.
     • Local electrical codes (e.g., NEC, IEC, etc.).
2. Rounding of AWG Sizes:
   • The tool calculates the exact equivalent AWG size but may round to the nearest standard AWG size for practical purposes.
3. Range Limitations:
   • The ampacity reference table covers AWG 14 to AWG 4/0. If you input a wire size outside this range, the tool may return “N/A” for ampacity.

Why Use This Converter?

1. Quick Conversions:
   • Instantly calculate equivalent wire sizes between AWG and mm².
2. Ampacity Reference:
   • Provides an easy way to estimate the safe current-carrying capacity of a wire.
3. Versatility:
   • Useful for professionals and enthusiasts working on electrical installations, automotive wiring, or designing systems in regions that use different standards.
4. User-Friendly:
   • No need to consult multiple charts or perform complex calculations manually.

Disclaimer

This converter is for reference only. Always consult official electrical codes (e.g., NEC, IEC) and a qualified electrician to ensure compliance with safety standards for specific installations.