SZToolify brings practical online calculators together in one place, organised by the job you are trying to do. Pick a category below to see every tool in it, or jump straight to the calculator you need. New tools are added regularly; those marked Soon are in development.

Browse calculators by category

Why use SZToolify calculators?

Each calculator is built for one specific task and shows how the answer is worked out, so you get a result you can trust and understand. All tools are free, need no account, and work on phones, tablets and computers. Construction and home improvement calculators support both metric and imperial units, and finance tools let you enter the tax rates that apply where you live.

Frequently asked questions

Are all SZToolify calculators free?

Yes. Every calculator and tool on SZToolify is free to use without signing up.

What does “Soon” mean next to a tool?

It means the tool is planned and in development. The link takes you to its category page, where you can read what it will do. Once it is live, the label disappears and the link opens the calculator directly.

Can I request a new calculator?

Yes. Use our contact page and choose “Suggest a new tool”. We use these requests to decide what to build next.