Contact
Found a bug, want to suggest a tool, or have a question about the site? We'd love to hear from you.
Write tohello@usefultools.exampleand we'll get back to you as soon as we can. Plain-text email, no forms, no ticket systems.
What helps us help you
- The tool and page you were using.
- Your browser and device (e.g. "Chrome on Windows 11").
- What you expected, and what happened instead.
Remember: nothing you typed into a tool ever reaches us, so if you're reporting a calculation bug, include a small example we can reproduce.