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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.
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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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