About Us
Toolzyn is a free collection of online calculators, converters and generators. We build tools that answer everyday questions quickly: how much will I save by overpaying my mortgage, what is my take-home pay, how much concrete do I need, what is the LCM of these numbers.
What we believe
- Clear answers first. Every tool shows the result at the top, followed by a plain-English explanation of how it was worked out.
- Free and private. Calculations run in your browser. We do not ask you to sign up and we do not store the numbers you type into a tool.
- Local where it matters. Tax, salary and property rules differ between the United States, the United Kingdom, Canada and Australia, so we build country-specific versions when the rules are different.
How we build and check our tools
Each calculator is based on published formulas and official rates where they apply. We test results against worked examples and review rates when governments announce changes. Where a result depends on rules that can change, we say which year or assumptions the tool uses.
Important note
Our tools give estimates for general information. They are not financial, tax, legal or medical advice. For decisions that matter, please check with a qualified professional.
Get in touch
Spotted a mistake or want a new tool? Contact us – we read every message.
