Cable Size Calculator

Required size at 25°C cable temperature Length (metres)
Max current (amps)
Allowable voltage drop (volts)
Required Cable size (mm²)
Suggested AWG/B&S cable size 9
Required size at other temperatures Cable Temperature (°C)
Required Cable size (mm²)
Suggested AWG/B&S cable size 9

Cable Voltage Drop Calculator

Set Cable size from strands Strand diameter (mm)
Strand count
Set Cable size from AWG/B&S cable size
Voltage drop at 25°C cable temperature Cable size (mm²)
Length (metres)
Max current (amps)
Voltage drop (volts)
Voltage drop at other temperatures Cable Temperature (°C)
Voltage drop (volts)

Notes: Cable temperature is the actual temperature of the copper, not the ambient air temperature. Current flow will increase cable temperature. Cable length is for total length of positive plus negative cable.

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