Beginner
AWG to mm² Conversion Formula
Convert between AWG wire gauge and cross-sectional area in mm² or circular mils — with quick reference table.
Formulas
A(mm²) = 0.012668 × 92^((36−AWG)/39)
AWG to mm² conversion
d(mm) = 0.127 × 92^((36−AWG)/39)
AWG to diameter in mm
kcmil = d(mils)² / 1000
Diameter in mils to kcmil
Variable Definitions
AWG=American Wire Gauge number(gauge (dimensionless))
A=Cross-sectional area(mm² or circular mils)
d=Wire diameter(mm or mils)
kcmil=Thousand circular mils(kcmil (MCM))
Worked Example
Convert 10 AWG to mm².
- A = 0.012668 × 92^((36−10)/39)
- A = 0.012668 × 92^(26/39)
- A = 0.012668 × 92^0.6667 = 0.012668 × 415.7
- A = 5.26 mm²
Answer: 10 AWG = 5.26 mm²
When to Use
- •Converting between American (AWG) and metric (mm²) wire sizes
- •International project specifications using both systems
- •Comparing conductor sizes across different standards
- •Working with IEC vs NEC conductor designations
Standards & References
- NEC Chapter 9, Table 8 — Conductor Properties (includes mm² equivalents)