ToolMaster360 is a growing collection of free online tools: calculators, converters, generators and quick tests that help with everyday tasks. Every tool is free to use, needs no account and opens ready to go.
How the tools work
Each tool runs entirely inside your web browser. When you type numbers or text into a calculator, the math happens on your own device. Nothing is uploaded to our servers, so your information stays with you.
How we check our tools
Before a tool goes live, its calculations are tested against worked examples and known answers. Each page explains the formula or method used, so you can follow the steps and check a result yourself. If you spot a mistake, please tell us through the contact page and we will fix it quickly.
A note on estimates
Our finance, grade and measurement tools give estimates for planning. They are not financial, legal or professional advice. For big decisions, confirm the numbers with a qualified professional.