01
Engineer-grade maths
Reliable formulas for voltage drop, short circuit, Zs, diversity and more, with conductor and installation variables available where they matter.
Electrical calculations • made easy
Fast, accurate electrical calculations—without the spreadsheet maze.
From voltage drop and cable sizing to maximum demand, conduit sizing and power calculations, CalcWiz gives electricians and engineers clear numbers for quoting, design and QA.
10+built-in tools
AS/NZSfriendly options
A+clear printouts
Voltage drop2.38%
Selected cable16 mm²
Why CalcWiz
Built for the field.
Built for the field.
Trusted in the office.
CalcWiz keeps common electrical workflows on one screen, applies practical derating inputs and presents each result with the assumptions visible for easy checking.
✓ Simple enough for a quick site check. Clear enough for the project file.
Built around real work
Calculate with confidence
Fewer tabs, fewer repeated inputs and a much clearer path from question to documented result.
02
One-screen workflows
Minimal typing, helpful units and sensible defaults. Adjust an input and get a useful answer without rebuilding an entire worksheet.
03
Clear, printable results
Neat summaries show inputs, assumptions and outputs for attaching to quotes, tenders, designs and QA records.
The CalcWiz toolbox
Everyday calculations,
Everyday calculations,
all in one place.
A practical collection of tools for electricians, estimators, designers and engineers.
Single Cable Calculation
Select cable sizes using current-carrying capacity, installation conditions, derating factors and voltage-drop checks.
Power Calculations
Work through single- and three-phase power, current, voltage, power factor and related electrical formulas.
General Calculations
Keep common geometry, unit conversion, time and general-purpose site calculations together in one practical toolset.
Resistor Calculator
Calculate resistance values and common series or parallel resistor combinations without repeated manual formulas.
LED Saving Calculator
Compare existing lighting against LED alternatives and estimate energy, running-cost and payback savings.
Project Calculations
Save and organise calculation sets for a project so results remain easy to review, print and hand over.
Maximum Demand
Apply clear diversity workflows for distribution boards, final subcircuits and complete electrical installations.
Transformer Fault Level
Estimate prospective fault current from transformer rating, impedance and supply details for early design checks.
Conduit Selection
Check suitable conduit sizes from cable quantities and dimensions, with practical space and fill considerations.
Result summary
Supply400 V / 3 phase
Route length42 m
Design current63 A
Calculated voltage drop2.38%Within selected design limit
Print reportSave calculation
From input to answer
Results that are easier to check and easier to explain.
CalcWiz is designed to show the path behind the answer—not just a number in a box.
1
Choose the calculationStart with the task you are actually trying to solve.
2
Enter practical inputsUse conductor, installation and operating details relevant to the job.
3
Review and documentCheck the assumptions, then print or save a clean result summary.
Straightforward pricing
Pick the level that suits your work
Start with the complete calculation toolkit and move up when you need saved progress or multi-user support.
Simple
$20/ year
All the core calculation and reporting tools for an individual user.
- All calculators
- Print and save reports
- Conduit selection tool
- Email support
Most popular
Pro
$49/ year
For regular users who want to save progress and receive priority support.
- Everything in Simple
- Save calculation progress
- Regular feature updates
- Phone support
Team
Let’s talk
Flexible licensing and support for businesses with several users.
- Everything in Pro
- Multi-user environment
- Organisation-based pricing
- Priority remote support
Frequently asked questions
Useful answers before you get started.
Still unsure which option is right? Send the CalcWiz team a message below.
Talk to the team →Which cable types are covered?+
Copper and aluminium conductors across common 75°, 90° and 110° insulation selections, plus aerial options. Available correction inputs include ambient temperature, grouping and soil depth.
Does CalcWiz support single and three phase?+
Yes. The relevant tools allow DC, single-phase and three-phase selections so the calculation matches the supply arrangement.
Are the results suitable for documentation?+
CalcWiz reports can include the key inputs, assumptions and calculated results for project records, quotes, designs and QA packs.
What regions or standards does CalcWiz suit?+
The terminology and options align with common Australian and New Zealand electrical conventions. Users should always verify the final design against the current standards and local requirements applying to the project.
Ready to simplify the next calculation?
Spend less time building the formula.
Spend less time building the formula.
Spend more time using the answer.
Contact CalcWiz
Questions, demos or team pricing?
Send us a message and the team will get back to you as soon as possible.
sales@calcwiz.com.au
Built on a practical legacy
CalcWiz was created to help working electricians make complex calculations simpler. That goal still guides every update.