Finding the right tool
There are three ways through this list. The search box understands plain descriptions rather than tool names, so "how much paint do I need" and "what day was I born" both land somewhere sensible. The category buttons narrow the grid instantly, without reloading the page. Or you can simply read down the list — with 41 tools it is still short enough to scan.
Every tool follows the same shape: the working part sits at the top of its page, and the explanation, worked examples and common questions sit underneath for anyone who wants them. Nothing asks you to register, and where a calculation can run on your own device rather than a server, it does.
The library grows steadily. New tools are chosen by what people ask for, and each one has to pass an automated content and accuracy check before it is published — which is why this list is shorter than it could be.