General and calculation feedback
Email the dedicated contact address with the calculator, unit system, inputs, expected result, and actual result. Do not attach private project documents or sensitive personal information.
Security reports
Report suspected vulnerabilities confidentially through the Project Quantity Lab GitHub Security Advisory form. Do not open a public issue for an unpatched vulnerability or include credentials, personal information, or data that does not belong to you.
Accessibility feedback
Describe the page, device, browser, assistive technology, and the task you could not complete. A screenshot is helpful when it does not contain private information.
Last reviewed: August 6, 2026. Product functionality and disclosures should be reviewed whenever third-party services or data flows change.