About
Workbench Wizard
What is Workbench Wizard?
Workbench Wizard is a collection of free calculators and tools designed to make life easier. Whether you're in the workshop, tackling a DIY project, doing woodworking, working with electronics, or need quick general math—you'll find a tool here to help.
Who is it for?
Makers, DIYers, professionals, and students—anyone who needs quick, accurate calculations without the hassle. Our calculators are built to be straightforward and reliable so you can focus on getting the job done.
How it works
No account required. Browse by category or use search to find the calculator you need, open the tool, enter your values, and get results. It's that simple.
What you'll find here
The collection spans the practical maths that real projects throw up. For the workshop there are tools for board feet, lumber weight, cut lists, wood movement, shelf sag, and even spacing. For construction and DIY there are stair, decking, tiling, and baluster calculators. For electronics and tech there are resistor codes, Ohm's law, filters, and subnetting. And there is a steady supply of everyday helpers — fractions, percentages, unit conversion, and more — all in one place.
Accuracy and honest estimates
Every calculator is built to give clear, reliable results, and each one comes with a plain-English explanation of the formula and a worked example so you can see how the numbers come together. Where a figure is an estimate — material quantities, drying times, or anything that depends on real-world conditions — we say so and suggest a sensible allowance, because a calculator should help you plan, not give you false certainty.
Learn the why, not just the answer
Beyond the tools, our guides explain the methods behind the maths — how to calculate board feet, why a 2×4 isn't two by four, how wood moves with the seasons, and how to read a resistor's colour code. The aim is to leave you more capable, not just to spit out a number.
Free and improving
Workbench Wizard is free to use, and the collection keeps growing. If a calculator you need is missing, or you spot something that could work better, we'd genuinely like to hear about it — use the feedback page to let us know.