Conduit Fill Calculator
Enter your conduit size and cable count/diameter to check the fill percentage against the common 40% trade guideline for easy pulling.
Please note: General guidance only — verify against the current standard before relying on this result. Not a substitute for a licensed electrical design.
Conduit fill calculator
Cross-sectional area method, uniform cable diameter.
Check the cable's data sheet for its actual overall diameter.
Fill
0%
Working:
40% is a common trade guideline for pulling ease, not a fixed AS/NZS 3000 limit — always check the conduit manufacturer's pulling tables and AS/NZS 2053.
Export this result as a PDF
A clean, branded PDF of your inputs and result — handy for records or sending on.
Running new circuits as part of aswitchboard upgrade? Check your cable sizing with thecable size calculatorfirst.
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