Cable Size Calculator
Estimate the cable size (sqmm) you need so voltage drop stays within limits, for copper or aluminium conductors. Adjust the inputs, then get an engineered electrical design from our team.
Your circuit
Sizes the conductor on voltage-drop basis (assumed pf 0.85). A full design also checks current-carrying capacity, derating, short-circuit and earthing.
Get an engineered electrical design — free
Our electrical engineers will size cables, protection and earthing across your project. We'll attach the estimate above automatically.
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Thanks! Our electrical team will send your tailored cable & protection design within one business day.
Indicative estimates only — not a binding design. Actual cable selection must verify ampacity, derating factors, short-circuit withstand and protection coordination per IS/IEC.