Maximum Demand

Maximum Demand

Maximum Demand

AS/NZS 3000 diversity-based demand calculation

Supply Configuration
Load Items

Subtotal: 1,000W connected → 660W after diversity

Subtotal: 2,400W connected → 960W after diversity

Subtotal: 8,000W connected → 5,600W after diversity

Results

Connected Load

11.40 kW

55.1 A

Maximum Demand

7.22 kW

34.9 A

Recommended Main Breaker

40A

Single Phase

230V / PF 0.9

Diversity factors based on AS/NZS 3000:2018 (Wiring Rules). Always verify with a licensed electrician and your local network distributor. Maximum demand figures must comply with local network tariff requirements.

Questions? Contact support

© 2026 SiteMaths. All rights reserved.

SiteMaths

Welcome to SiteMaths

The professional construction toolkit built for all trades, builders, estimators and site managers.

Compliance-Ready Calculations

Every calculator references your local building codes — AS, NZS, NEC, BS, NBCC — so your results meet the standards that matter on site.

40+ Professional Calculators

Concrete, carpentry, plumbing, electrical, civil, landscaping & bricklaying — all the tools tradies actually need.

AI Plan Scan (Pro)

Upload drawings or site plans and let AI extract quantities, dimensions and material estimates automatically.

Save & Revisit

Save calculations to projects, export PDFs and pick up exactly where you left off.

Welcome to SiteMaths

Please review and accept our terms before continuing

Terms of Use – Summary

SiteMaths provides construction estimation tools for informational and planning purposes only. All calculations are indicative and should not replace the advice of a licensed engineer, builder, or qualified professional.

By using SiteMaths you agree that:

  • Results are estimates only and may not reflect actual site conditions.
  • You will verify all calculations with a qualified professional before commencing work.
  • SiteMaths accepts no liability for errors, omissions, or losses arising from use of this app.
  • You will not reproduce, resell, or distribute any part of this app without written permission.
  • Your use of this app is subject to our full Privacy Policy and Terms of Service.

View the full Terms of Service and Privacy Policy.

© 2026 SiteMaths. All rights reserved.

SiteMaths

Welcome to SiteMaths

The professional construction toolkit built for all trades, builders, estimators and site managers.

Compliance-Ready Calculations

Every calculator references your local building codes — AS, NZS, NEC, BS, NBCC — so your results meet the standards that matter on site.

40+ Professional Calculators

Concrete, carpentry, plumbing, electrical, civil, landscaping & bricklaying — all the tools tradies actually need.

AI Plan Scan (Pro)

Upload drawings or site plans and let AI extract quantities, dimensions and material estimates automatically.

Save & Revisit

Save calculations to projects, export PDFs and pick up exactly where you left off.

Welcome to SiteMaths

Please review and accept our terms before continuing

Terms of Use – Summary

SiteMaths provides construction estimation tools for informational and planning purposes only. All calculations are indicative and should not replace the advice of a licensed engineer, builder, or qualified professional.

By using SiteMaths you agree that:

  • Results are estimates only and may not reflect actual site conditions.
  • You will verify all calculations with a qualified professional before commencing work.
  • SiteMaths accepts no liability for errors, omissions, or losses arising from use of this app.
  • You will not reproduce, resell, or distribute any part of this app without written permission.
  • Your use of this app is subject to our full Privacy Policy and Terms of Service.

View the full Terms of Service and Privacy Policy.