Contact us
We genuinely want your feedback, it is how the site improves. Whether you have spotted a miscalculation, want to suggest a tool we should build next, or have a question, we would love to hear from you.
Reach the team at [email protected]. We read every message.
Reporting an error
Accuracy matters to us. If a result looks wrong, please include the tool name, the exact inputs you used, and the answer you expected. That lets us reproduce and fix it quickly.
Suggesting a tool
Tell us what you were trying to do and we will consider it for the roadmap. Many of our tools started as a reader request.