Voltage Drop Calculator
Enter your design current, cable length and size — get the voltage drop in volts and percent, with the working shown so you can check it.
Please note: General guidance only — verify against the current standard before relying on this result. Not a substitute for a licensed electrical design.
Voltage drop calculator
Based on the AS/NZS 3008 mV/A/m method, single-phase.
Result
0.0V (0.0%)
Working:
AS/NZS 3000 general limit is 5% of nominal voltage — always confirm the limit that applies to your installation.
Export this result as a PDF
A clean, branded PDF of your inputs and result — handy for records or sending on.
Sizing a cable that runs too small for its length is one of the most common causes of anout-of-date switchboardstruggling under load. If this result is telling you a bigger cable is needed, ourcable size selectorwill find the smallest size that clears your limit.
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