Contact

Best way to reach us is email: [email protected].

What we especially want to hear about

• Calculation bugs. Include the tool, your inputs, the output you got, and the answer you expected (with source).
• Source corrections. If a value we cite disagrees with the primary literature, please quote both.
• Accessibility issues. Screen reader problems, keyboard traps, contrast failures.
• Tool requests. What calculator do you keep wanting and can't find?