Contact
Report calculation errors, translation issues, accessibility problems, or feature suggestions.
Last updated: 2026-08-02
Include the tool URL, input values, expected result, actual result, and browser information. Do not send passwords, card details, or unnecessary sensitive information.
What we can help with
- Questions about tool formulas or results
- Display, mobile, or browser compatibility issues
- Privacy and data-handling questions
- Partnership, licensing, or reasonable feature proposals
Response time
Immediate responses are not guaranteed. Security, privacy, and clear calculation errors receive priority.