Maximum Demand Calculator
A simplified diversity estimate for planning — real AS/NZS 3000 maximum demand uses tabulated diversity per load category, done by a licensed designer.
Please note: General guidance only — verify against the current standard before relying on this result. Not a substitute for a licensed electrical design.
Maximum demand estimator
Simplified diversity estimate — a compliant calculation uses tabulated diversity per load category.
Estimated maximum demand
0 kW
This is a rough planning figure only. A compliant maximum demand calculation for switchboard/supply sizing must be done per AS/NZS 3000 by a licensed designer.
Export this result as a PDF
A clean, branded PDF of your inputs and result — handy for records or sending on.
Planning to add load — solar, EV charging, more machinery? If your board is already close to capacity, it may need aswitchboard upgradebefore the new equipment goes in.
Need the real numbers signed off?
This tool is a starting point. Get a licensed design or on-site assessment for anything going to certification.
- Quote on the spot — a fixed price before work starts
- Booked in as soon as we can fit you in
- Certificate + asset register within 24h of completion
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