Contact & Support

For calculator issues, include the input values, expected result and browser version in your message so that the computation can be reproduced without uploading private order details.

Open a new support issue on GitHub (a free GitHub account may be required). This repository's Issues feature is enabled. You can also review existing public issues before reporting a bug.

Issues are public. Please do not share your email address, private customer details, or confidential orders. You can inspect the calculation formula before reporting a discrepancy.