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Copper Wire Weight Calculator — g/m, kg/km & Total Copper Mass

Editable live calculator

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No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Conductor size input Conductor area / diameter Interpretation follows the selected size mode.Length unit Length per conductor Physical conductor quantity No hidden return conductor is added.Copper density (kg/m³) Nominal copper density; use documented material density when known.Procurement allowance (%) Applied to total order copper mass.Copper rate per kg (optional) 0 disables cost.Target mass unit Target copper mass (optional) Reverse-solves whole equal-length conductor runs.Manufacturer kg/km (optional) Compare published mass with theoretical bare-copper kg/km.

Calculated result

8.96 kg · 19.753 lb

2.5 mm² conductive copper area

22.4 g/m · 22.4 kg/km · 0.01505 lb/ft bare copper

2.24 kg per entered conductor run · 8.96 kg net for 4 conductors

No procurement allowance applied

Enter rate/kg for material-cost planning

Enter target mass for reverse whole-run count

Enter manufacturer kg/km to compare finished/published mass

Show the working

1. Bare copper mass per metre = 2.5 mm² × 8,960 kg/m³ ÷ 1,000,000 = 0.0224 kg/m.
2. Entered length = 100 m; one conductor run = 0.0224 × 100 = 2.24 kg.
3. Net copper = 2.24 × 4 = 8.96 kg.

Bare conductive-metal mass only. Insulation, jacket, braid, shield, armour, fillers, connectors, reel/drum and packaging are excluded. For stranded conductors enter total conductive copper area, not cable outside diameter. Use manufacturer kg/km for finished cable shipping/tray loads.

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