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Cable Size Calculator
DC Cable Voltage Drop Calculator
Input your data below to calculate minimum cable size required
System Voltage
Select...
12V
24V
Voltage Drop
?
Select desired voltage percentage. 1% for chargers, 3% for essential circuits (bilges, panel supplies), 10% for standard circuits.
Select...
1%
3%
10%
Current (Amps)
?
Enter max current draw of the circuit.
Length (Metres)
?
Enter return length of cable (i.e. positive and negative lengths).
Minimum cable size required
Based on the above details
Enter actual cable size you will use
Selected size (mm)
Actual voltage drop
Based on cable size used
!
The above is calculating cable size based on voltage drop. Always cross reference current carrying capabilities of the cable and any additional derating factors.
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