UOM Converter

Wire size and conduit converters

mm² → AWG / kcmil

Metric wire area to the matching North American building-wire size.

Try an example

Convert from

More optionsCopper
Metal (for weight)

2.5 mm² equals

Cross-sections to scale: 2.5 mm² (entered), 14 AWG (nearest · 2.08 mm²), 12 AWG (next larger · 3.31 mm²)2.5 mm²entered14 AWGnearest · 2.08 mm²12 AWGnext larger · 3.31 mm²

Weight, bare copper

How it's calculated
  • AWG diameter = 0.127 mm × 92^((36 − gauge) ÷ 39), the ASTM B258 definition. 1/0 is gauge 0, 4/0 is gauge −3.
  • 1 kcmil = 1,000 circular mils = 0.5067 mm².
  • Weight = area × density: copper 8.89 g/cm³, aluminum 2.705 g/cm³. Bare solid metal; stranding adds about 2%, insulation not included.

Worked examples

2.5 mm² equals

  • Nearest AWG / kcmil size: 14 AWG
  • Smallest size at least as big: 12 AWG
  • Thousand circular mils: 4.93 kcmil
  • Pounds per 1,000 ft: 14.9 lb
  • Kilograms per km: 22.2 kg

35 mm² equals

  • Nearest AWG / kcmil size: 2 AWG
  • Smallest size at least as big: 1 AWG
  • Thousand circular mils: 69.07 kcmil
  • Pounds per 1,000 ft: 209.1 lb
  • Kilograms per km: 311.2 kg

120 mm² equals

  • Nearest AWG / kcmil size: 250 kcmil
  • Smallest size at least as big: 250 kcmil
  • Thousand circular mils: 236.82 kcmil
  • Pounds per 1,000 ft: 716.9 lb
  • Kilograms per km: 1,066.8 kg

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