AWG Wire Gauge Calculator
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Formula: AWG lookup table (ASTM B258)
AWG Wire Gauge Calculator
AWG (American Wire Gauge) is the standard system for specifying wire sizes in North America. Smaller numbers indicate larger wires.
Conversion Formula
AWG lookup table (ASTM B258)
AWG values follow a geometric progression. Each 6-gauge decrease doubles the wire diameter and quadruples the cross-sectional area.
Step-by-Step Examples
12 AWG = 2.053mm, 25A max
Standard for 20A circuits
14 AWG = 1.628mm, 20A max
Standard for 15A circuits
Frequently Asked Questions
What does AWG stand for?
AWG stands for American Wire Gauge, a standardized system for measuring wire diameter used primarily in North America.
Does a higher AWG number mean thicker wire?
No, higher AWG numbers mean thinner wire. AWG 10 is thicker than AWG 14.
What wire gauge should I use for 20 amps?
Use 12 AWG for a 20-amp circuit per the National Electrical Code.