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Electrical Calculations • Made Easy

Meet CalcWiz — fast, accurate electrical calculations.

From voltage drop and cable sizing to maximum demand, conduit sizing and power calculations, CalcWiz gives electricians and engineers the numbers you need — clearly explained and ready for quoting, design and QA.

Try CalcWiz Explore Features
10+
built-in calculators
AS/NZS
friendly options
A+
clear printouts

Why electricians choose CalcWiz

  • Electricians choose CalcWiz for fast, one-screen workflows with built-in derating factors. It shows clear step-by-step results with all assumptions visible for easy checking. Simple, accurate, and designed for real on-site efficiency.
Stylised preview

Built for the field & office

Everything you need to calculate with confidence — fast.

Accuracy

Engineer-grade maths

Reliable formulas for voltage drop, short-circuit, Zs, diversity and more. Choose copper/aluminium, insulation ratings, installation methods, and correction factors.

Speed

One-screen workflows

Minimal typing, unit helpers and sensible defaults. Tweak inputs and see results instantly — perfect for site checks and client queries.

Output

Clear, printable results

Neat summaries show inputs, assumptions and results for attaching to quotes, tenders and QA records.

Included calculators

A toolbox tailored for day-to-day electrical work.

Cable Calculators

75°, 90°, 110° & aerial — with derating for ambient, grouping and soil depth.

Voltage Drop

Single & three-phase with PF, conductor type and route length.

Maximum Demand

Diversity rules for boards and whole installations.

Conduit Selection

Max numbers in conduit and minimum earth sizes.

Earth Fault Loop

Ze, Zs, R1+R2 and disconnection targets.

Power Calculations

Ohm’s Law, impedance, motor power, wire resistance, parallel loads.

Conversion Tool

Metric ↔ Imperial with common multipliers.

General Calculations

Handy geometry and reference tools (triangle, volume, times, etc.).

Lighting (basic)

Quick lux and spacing estimates for early planning.

Simple pricing

Start with the core toolkit. Upgrade when you need more.

Simple

$20 Per Year

  • All Calculators
  • Print & Save Reports
  • Conduit Selection Tool
  • Email Support
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Pro

$49 Per Year

  • All Simple Features, Plus,
  • Ability to Save Progress
  • Regular updates
  • Phone Support
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Team

Contact

  • All Pro Features, Plus:
  • Pricing to Suit Multi User Organiasations
  • Priority Remote Desktop Support
  • Multi User Enviroment
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FAQ

Which cable types are covered?

Copper and aluminium in 75°, 90° and 110° insulation ratings, plus aerial options. Derating factors include ambient temperature, grouping and soil depth.

Does CalcWiz support single and three phase?

Yes. Most tools let you switch between DC, single phase and three phase where relevant.

Are the results suitable for documentation?

Yes — printouts include inputs, assumptions and results so you can attach them to quotes, designs and QA packs.

What regions or standards does CalcWiz suit?

The tools and wording align with common AS/NZS conventions and can be used broadly. Always verify against your local requirements.

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Contact

Questions or demo enquiries? Send us an message — we’ll be in touch ASAP.