About Tinker Calc

Tinker Calc is a collection of free, simple online tools made by Realm of Coin Design, a small independent studio in Ontario, Canada.

Meet Fizzwick, our resident gnome tinkerer. In his workshop he builds one handy little contraption after another: calculators, converters and planners that answer everyday questions in a second.

Every tool runs entirely in your browser: what you type is never sent to us or stored anywhere. Each calculator shows the formula it uses, so you can check the maths yourself.

We build the tools with the help of AI, and every calculator must pass a set of worked test cases before it is published. If you spot a mistake, please let us know through our Etsy shop messages and we'll fix it.

The tools are for general information only and are not financial, medical or legal advice. For important decisions, check with a qualified professional.

The site is free because it shows ads.