Wire Gauge Calculator
Find the cross-sectional area of an AWG wire and a rough chassis-wiring current limit.
Diameter1.628mm
Cross-section area2.081mm²
American Wire Gauge (AWG) sets a wire's diameter: d(mm) = 0.127 × 92^((36 − AWG) ÷ 39). Lower numbers are thicker. For 14 AWG, d ≈ 1.628 mm, giving an area of π/4 × d² ≈ 2.08 mm². As a rough guide, chassis wiring tolerates about 5–6 A/mm², so 14 AWG handles roughly 10–15 A in short, well-ventilated runs. Always check an ampacity table and local code for the real limit — insulation, length and bundling matter.
Questions
How is AWG converted to millimetres?
Diameter in mm = 0.127 × 92^((36 − AWG) ÷ 39). For 14 AWG that is about 1.628 mm, or roughly a 2.08 mm² cross-section.
How much current can a wire carry?
It depends on insulation, length, bundling and how the wire is run. A rough chassis-wiring rule is 5–6 amps per mm², but always confirm with a proper ampacity table and local electrical code.