Cable Size Calculator
Cable Size Calculator — quick estimate
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.
Your request is in
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.
Need an exact BOQ, rate analysis or measurement sheet?
This is a quick engineering estimate. For tendering, billing or audit, our QS & estimation team prepares an item-wise BOQ, rate analysis and a verified measurement sheet to IS / CPWD norms — backed by 15+ years and ISO 9001:2015 quality processes.