Cable Size Calculator

Online electrical calculator which helps you to calculate the size of copper, aluminium wires in an electrical circuit.

Calculate Copper, Aluminium Wire Size in Electrical Circuit

Single Phase Three Phase
amps
volts
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Single Phase Circuits Formula

Wire Circular Mils = 2 x Specific Resistance x Amperes x Distance / (Voltage Drop / Source Voltage)

Three Phase Circuits Formula

Wire Circular Mils = 2 x 0.866 x Specific Resistance x Amperes x Distance / (Voltage Drop / Source Voltage)
Where, Specific Resistance = 11.2 for Copper Cable, Specific Resistance = 17.4 for Aluminium Cable,

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