Smythy / Electrical calculators
About Smythy
Electrical calculators that keep the working beside the answer.
The answer needs its working
A cable size or percentage only tells part of the story. The load, route length, installation conditions and chosen method explain how you got there. Smythy puts those details beside the result so you can review the calculation and compare another option.
The installation tools are built around Australian electrical practice, with the AS/NZS method and scope named on each page. DC tools cover circuit fundamentals. Engineering tools identify where they use a screening or educational model, so you can judge whether a calculation fits the question in front of you.
All tools are free, with no account required. Work in your phone or desktop browser and download a watermarked PDF to keep the inputs, result and method together. A PDF records the calculation; it does not certify the installation.
If a tool gives an unexpected result, send the inputs and the reference you are comparing it with. A repeatable example helps us investigate the calculation and improve the explanation.