Product GuidesAhmed Tayeh
Free Electrical Calculators for Australia: Which One to Use When
Every free CableHero calculator in one guide: what it answers, the standard it w…
Read more: Free Electrical Calculators for Australia: Which One to Use WhenAS/NZS 3008.1.1:2025AS/NZS 3000:2018AS/NZS 5033:2021IEEE 1185-2019
Cable sizing and electrical design, done to the standard.
Calculate cable sizes, voltage drops and maximum demand with precision. Draw the single line diagram, link it to the numbers, and export reports a certifier can sign.
Or use the 24 free calculators, no account needed.
- Experience
- 10+ yr
- Projects
- 5K+
- Free tier
- A$0
C1 · Main switchboard feeder
25 mm² 4C+E Cu · 2 × 1C
VD 1.31 % · Zs 0.42 Ω · PASS
How It Works
One workflow from load to signed-off report
Start sizing cables, creating SLD drawings and calculating maximum demand in minutes. No complex setup required.
- 01
Size
Enter the load, run length and installation. The engine applies every derating table, checks voltage drop and fault loop impedance, and picks the smallest compliant cable.
Learn more: Size - 02
Draw
Lay out the single line diagram, link each cable to its calculation, and let the schedule update itself as the design changes.
Learn more: Draw - 03
Demand
Build the maximum demand study with AS/NZS 3000:2018 Appendix C diversity, per phase, and size the mains from it.
Learn more: Demand - 04
Report
Export branded PDF reports, cable schedules and drawings with the full working, ready for the certifier.
Learn more: Report
Try the engine
Size a cable right now
A quick AS/NZS 3008.1.1:2025 estimate, no account needed. The full cable size calculator is free too, with every derating table, fault loop impedance and protection checks.
Free calculators
24 tools, no account needed
Every calculator runs the same engine as the app and cites the clause or table it uses.
Features
Everything you need for electrical engineering
Why CableHero
Trusted by electrical engineers across Australia
CableHero is designed by electrical engineers, for electrical engineers. We understand your workflow and compliance requirements.
- AS/NZS 3008.1.1:2025 & 3000:2018 compliant
- Professional PDF reports
- Cloud-based and accessible anywhere
- Regular updates and support
Built on the standards you certify against
AS/NZS 3008.1.1:2025AS/NZS 3000:2018AS/NZS 5033:2021IEEE 1185-2019
Simple Pricing
Choose the plan that works for you
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Get in touch
Have questions about CableHero, or need help with your electrical calculations? Send us a message and we'll get back to you as soon as possible.
- Response time
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