toolqoe makes small online tools. Each one does a single job and tells you where its numbers come from.
Why “show their sources”
Most calculator and lookup sites give you a number and nothing else. If the number comes from outside the site, such as an exchange rate, an earthquake or a tax rate, our tool names the institution or document it came from. If it is calculated, the page shows the formula. When a tool can’t find a reliable source for a figure, it doesn’t make one up. It says so instead.
How the tools are checked
- Worked examples. The calculation code includes tests with known answers, so a formula change that breaks a result is caught.
- Named sources. For example, earthquake lists come from AFAD and Kandilli. They are shown separately and never merged, because the two networks measure differently.
- Your data stays with you. Most tools run entirely in your browser. The privacy policy says which ones need our server and why.
English and Turkish
Many of these tools were first built in Turkish for sorgu.co. The general-purpose ones are being translated a few at a time. Tools tied to Turkish institutions, such as prayer times or the land registry, stay Turkish because their data is Turkish. Türkçe
Videos
Short videos on our YouTube channel explain the maths behind the tools: percentages, degrees and radians, the qibla angle and more.
How the site is funded
The tools are free and need no account. The site shows ads from Google AdSense. Ads do not affect the results any tool gives you.