ElecAS
ElecAS Australian Electrical Design Calculators
Access Australian electrical calculators for maximum demand, cable selection, voltage drop, conduit sizing, cable tray sizing and related design workflows.
Why this page matters
Access Australian electrical calculators for maximum demand, cable selection, voltage drop, conduit sizing, cable tray sizing and related design workflows. This static content is published so the canonical route has meaningful crawlable HTML even before the interactive application hydrates.
Who this page is for
Electrical engineers, designers, estimators, contractors and project teams working to Australian standards.
Relevant standards
- AS/NZS 3000
- AS/NZS 3008
- AS/NZS 4777
What this tool helps with
- Browse every live ElecAS calculator from one directory.
- Move between demand, cable sizing and installation checks.
- Use standards-aware tools built for practical Australian workflows.
Free Australian electrical design calculator suite — ElecAS
What ElecAS is
ElecAS is a free online suite of 18+ electrical design calculators built specifically for Australian and New Zealand electrical engineers, contractors and designers working to AS/NZS 3000:2018 (the Wiring Rules) and AS/NZS 3008.1.1:2025 (cable selection). It covers maximum demand (Tables C1, C2 and C3), cable selection and sizing, voltage drop, voltage rise, conduit fill, cable tray fill, earthing cable sizing, current-carrying-capacity derating, power factor correction, UPS battery sizing, generator sizing, lighting design (lumen method) and more.
Every calculator runs entirely in the browser — no sign-up, no paywall on the core calculation, and a downloadable branded PDF report on the free tier. Paid Pro and Team plans add cloud project sync, project workspaces, branded multi-designer PDFs and team collaboration.
Built for Australian Standards
Unlike generic international calculators, ElecAS encodes the specific tables, formulas and worked examples from the Australian and New Zealand standards. Cable selection works against the 30+ tables from AS/NZS 3008.1.1:2025 (Tables 3–31), including current ratings, AC resistance, reactance and grouping factors. Maximum demand follows AS/NZS 3000:2018 Appendix C exactly — Table C1 for single and multiple dwellings, Table C2 for non-domestic installations and Table C3 for the energy method.
The cable database ships with 380+ real Prysmian Australia and Olex (Prysmian Group) catalogue products so conduit and cable tray fill calculations use manufacturer-published outer diameters and masses, not estimates.
Who uses ElecAS
ElecAS is used by electrical engineers (consulting, infrastructure, building services and renewables), licensed electrical contractors, electrical designers, certifiers, building surveyors and university students learning the AS/NZS framework. The interactive calculators are paired with citation-rich PDF reports that reference the standard, clause and table used for each result — suitable for inclusion in design submissions and design verification packages.
The author, Wisam Tozah, is an Associate Electrical Engineer (B.Eng Electrical, MIEAust, CPEng, NER, NSW DBP, NSW PRE, APEC, IntPE(Aus)) practising in Sydney, Australia.
What you get for free
All calculation engines, all standards references and all 18+ tools are free. The free tier includes a single-designer branded PDF report (your name, company and accent colour) for every calculation, with citations to the relevant AS/NZS clause and table. There is no calculation cap, no daily limit and no email-wall.
Pro and Team subscriptions add persistent cloud storage of saved calculations, project-grouped workspaces, multi-designer branded PDFs, team-shared cable libraries and collaboration features for larger consulting practices.
Frequently asked questions
Is ElecAS free for Australian electricians and engineers?
- Yes. Every calculator — cable selection, voltage drop, maximum demand (Tables C1, C2 and C3), conduit fill, cable tray fill, earthing, derating, power factor correction, UPS battery, generator sizing and the others — is free to use online. Branded PDF reports are included in the free tier. Pro and Team plans add cloud project sync and team collaboration.
Which Australian Standards does ElecAS implement?
- AS/NZS 3000:2018 (Wiring Rules) — particularly Appendix B (fault loop), Appendix C (maximum demand Tables C1/C2/C3) and Appendix D (conduit fill). AS/NZS 3008.1.1:2025 (Selection of cables) — Tables 3–31 for current ratings, AC resistance, reactance and grouping. AS/NZS 4777.1 for inverter voltage rise. AS/NZS 3017 testing references. IEEE 485, 1184 and 1189 for UPS battery sizing.
Do I need to sign up to use the ElecAS calculators?
- No sign-up is required for any calculator. You only need an account if you want to save calculations to your cloud project workspace, customise the branded PDF beyond the defaults, or invite team members. The full calculation, all standards lookups and the basic branded PDF are available immediately.
Can I trust the calculator outputs for design submissions?
- ElecAS is a documented design tool. Every calculation and PDF report cites the specific AS/NZS clause, table and formula used. The tool is designed and maintained by a Chartered Professional Engineer (CPEng, NER) practising under the Australian framework, but final verification of design outputs remains the responsibility of the certifying engineer for each project, as required under the AS/NZS framework.
Does ElecAS work offline?
- ElecAS is a Progressive Web App (PWA) — once loaded, the calculators work offline. Saved calculations sync to your cloud workspace the next time you are online. Add to Home Screen on iOS or Android, or Install as App in Chrome / Edge on desktop, to get the offline experience.
What does ElecAS cover beyond cable sizing?
- Maximum demand under AS/NZS 3000 Tables C1, C2 and C3; voltage drop and voltage rise (AS/NZS 4777.1); conduit fill (AS/NZS 3000 Appendix C); cable tray fill; earth cable sizing (AS/NZS 3000 Table 5.1); current-carrying-capacity derating (AS/NZS 3008.1.1 Tables 3.33–3.48); time-current curve (TCC) protection coordination; power factor correction capacitor sizing; UPS battery sizing (IEEE 485 / 1184 / 1189); generator sizing; lighting design (lumen method); LED inrush current; spatial design; and a free electrical CAD single-line-diagram builder.
How does ElecAS compare to ELEK, jCalc, CableHero, SparkyCalc and ECalPro?
- ElecAS focuses on Australian and New Zealand standards exclusively, ships real Prysmian and Olex catalogue cable data (not generic tables), and includes the full Appendix C maximum demand methodology (Tables C1 + C2 + C3 in one place), a free CAD single-line-diagram builder and a UPS battery sizing engine. All core calculators are free with no daily cap and no email-wall.