AWG to mm² Converter

Convert between AWG wire sizes and mm² cross-sectional area instantly with this accurate calculator.

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About This Tool

This AWG to mm² calculator provides precise conversions between American Wire Gauge (AWG) sizes and square millimeters (mm²) cross-sectional area. AWG is the standard wire sizing system used primarily in North America, while mm² is commonly used internationally. The tool includes a comprehensive dataset of AWG sizes from 0000 (4/0) to 40, with corresponding diameters in inches and millimeters, and calculated cross-sectional areas in mm². You can convert in both directions: enter an AWG size to get its mm² equivalent, or enter a mm² value to find the closest AWG size. Perfect for electrical engineering, automotive wiring, home electrical projects, and any application requiring accurate wire size conversions.

How to Use

  1. Select conversion direction: Choose 'AWG to mm²' or 'mm² to AWG' using the toggle.
  2. Enter value: For AWG to mm², enter an AWG size (e.g.,
  3. . For mm² to AWG, enter a cross-sectional area in mm² (e.g.,
  4. .
  5. Click 'Convert': The calculator will display the precise conversion result.
  6. View details: See additional information including wire diameter in both inches and millimeters.
  7. Convert again: Change values or direction to perform new conversions.
How to use calculator awg to mm2

Frequently Asked Questions

Find Quick Answers

What is AWG?
AWG stands for American Wire Gauge, a standardized wire sizing system used primarily in the United States and Canada. Lower AWG numbers indicate thicker wires (e.g., 4 AWG is thicker than 10 AWG).
How accurate is this calculator?
The calculator uses the standard AWG formula: Diameter (inches) = 0.005 × 92^((36-AWG)/39). This provides industry-standard precision for all AWG sizes from 0000 (4/0) to 40.
Can I convert mm² back to AWG?
Yes! Use the conversion direction toggle to switch to 'mm² to AWG' mode. Enter a mm² value, and the calculator will find the closest AWG size along with the exact mm² difference.
What AWG sizes are supported?
The calculator includes all standard AWG sizes from 0000 (4/0) to 40, covering the full range used in electrical applications from large power cables to fine electronics wiring.
Why is mm² important for wire sizing?
Square millimeters (mm²) represent the cross-sectional area of a wire, which directly correlates with its current-carrying capacity. Many international standards use mm² rather than AWG for specifying wire sizes.

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