Wire Size Conversion Calculator
AWG to diameter and area
Required Parameters
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Quick Answer
AWG (American Wire Gauge) is a logarithmic scale where lower numbers = thicker wire. The formula d(mm) = 0.127 × 92^((36-AWG)/39) converts any gauge to diameter. Each 3 AWG steps doubles the cross-sectional area and halves the resistance.
Calculateur de Section de Cable
Convertissez entre AWG et mm2 metrique.
Design Notes
AWG is used throughout North America while IEC metric sizes (mm²) are standard in Europe and Asia. There is no exact 1:1 mapping between the systems. For current-carrying capacity, always consult your local electrical code (NEC in the US, IEC 60364 internationally) as ampacity depends on installation conditions.
Common Mistakes
- 1
Thinking higher AWG = thicker wire. It is the OPPOSITE: AWG 10 is much thicker than AWG 24.
- 2
Using the same ampacity rating for wire in conduit vs free air — bundled wires must be derated significantly.
- 3
Ignoring voltage drop for long wire runs — even if the wire can handle the current, the voltage drop may be excessive.
Engineering Handbox
1. d(inches) = 0.005 × 92^((36-12)/39) = 0.0808 in 2. d(mm) = 0.127 × 92^0.615 = 2.053 mm 3. Area = π/4 × 2.053² = 3.31 mm² 4. Ampacity (NEC): 20A in 60°C insulation
Knowledge Base
Un numéro AWG plus élevé signifie-t-il un fil plus gros ?
Non, c'est l'inverse. AWG 10 (ø 2,59 mm, 5,26 mm²) est beaucoup plus épais qu'AWG 24 (ø 0,51 mm, 0,20 mm²). Chaque 6 AWG double la section, chaque 3 AWG double le courant admissible.
Comment convertir AWG en mm² ?
Formule : d(mm) = 0,127 × 92^((36−AWG)/39). Conversions courantes : AWG 18 = 0,82 mm², AWG 14 = 2,08 mm², AWG 10 = 5,26 mm². En Europe, on utilise directement la section en mm².