Wire Size Conversion Calculator

In electrical engineering and circuit design, choosing the correct wire gauge is critical to ensuring safety and efficiency. This calculator converts American Wire Gauge (AWG) into precise measurements for diameter, cross-sectional area, and Circular Mil Area (CMA) to help you determine current-carrying capacity and voltage drop.

Use this tool to:

  • Convert Gauge to Diameter: Translate standard AWG numbers into decimal inches or millimeters.
  • Determine Cross-Sectional Area: Calculate the surface area in mm^2 or in^2 to evaluate thermal limits.
  • Analyze Circular Mil Area (CMA): Obtain the specialized measurement used by industry professionals to define the conductor size of large cables.
Input Parameters
Physical Dimensions
Technical Reference

*The diameter is calculated using the formula: dn = 0.127 mm × 92(36-n)/39.
*Circular Mils (CMA) is defined as the square of the diameter in thousandths of an inch (mils).

Expand your toolbox

Simplify hardware and firmware development using the Quickboards Library. Eliminate R&D uncertainty and cut design time by assembling subcircuit schematics from a library of Processors, Sensors, Power Management, ADC/DACs, Memory, Interface circuits and more. Download the full library here. 

Quickboards Schematic Library Collection

Tools, Converters & Calculators

Analog Filters

Power Management

PCB & Circuit Design 

Value Conversion Calculators