Contact & Support

For private inquiries or calculator support, email [email protected]. This is our designated contact address. Email delivery depends on the domain's mail-provider DNS and mailbox setup; do not include passwords or confidential customer files.

For calculator issues, describe the input values, expected result and browser version so the computation can be reproduced. If you prefer a public bug report, open an issue on GitHub (a GitHub account may be required); you may also review existing public issues.

GitHub Issues are public. Never share private customer details or confidential orders in an issue. Review the calculation methods for assumptions and formulas.