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Wire Gauge / AWG Calculator
AWG to mm/mm², resistance per length, and ampacity for copper wire.
Quick Lookup
Diameter
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Area (mm²)
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Ampacity (A)
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Resistance (Ω/1000ft)
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Resistance (Ω/km)
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Diameter (in)
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Max Freq (100% skin)
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Complete AWG Table (Copper, 60°C)
| AWG | Dia (mm) | Dia (in) | Area (mm²) | Ω/1000ft | Ω/km | Ampacity (A) |
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Book a free strategy call →About AWG Wire Gauge
American Wire Gauge (AWG) is the standard wire sizing system in North America. Smaller AWG numbers = larger wire. Each 3-step decrease in AWG doubles the cross-sectional area. This calculator covers AWG 0000 (4/0) through 40. Built by Groundwork Analytics.