Contact
Report an error or suggest a correction
The calculators rely on versioned formulas and sourced constants: a calculation error, an outdated source or a debatable convention deserves a quick fix. Write to contact@friandise.store with the URL of the tool concerned, the values you entered, the result you expected and, if possible, the reference that justifies the correction. Constant fixes are tracked in the version log.
Accessibility questions
The site targets WCAG 2.2 level AA. If an accessibility barrier prevents you from using a calculator — keyboard navigation, screen reader, contrast, touch target size — describe the situation and the browser you use: these reports are handled as a priority.
Response time
Messages are handled within roughly two weeks. No calculation data is needed to process your request: please never include personal health information in your messages.