Units & Conversions
Wire Gauge Converter - Convert between AWG, mm², and diameter
Convert between AWG, mm², and diameter
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is AWG?
American Wire Gauge - a standardized wire size system. Lower number = thicker wire.
What wire size for 20 amps?
12 AWG for 20 amp circuits. Use 10 AWG for longer runs to prevent voltage drop.
AWG vs metric?
Europe uses mm² for area. AWG 14 ≈ 2.0mm², AWG 12 ≈ 3.3mm².
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About this tool
Use this Wire Gauge Converter to convert a value quickly and consistently. Provide Value, Diameter (mm), and Input Type and it returns Diameter and AWG.
If you are comparing results across tools, keep the same units and the same level of precision. The displayed value may be rounded, so copy more decimal places when you need a tighter match.