Contact

Contact

Use this page for correction requests, source suggestions and calculator improvement ideas.

What to include

For corrections, include the page URL, the current result or wording, the expected result or proposed change and any source that supports the correction.

Source suggestions

Useful source suggestions include official agencies, standards bodies, public-health institutions, central banks, statistical agencies and respected educational resources.

Status

This local build does not include a contact form yet. A production form should include spam protection and avoid collecting sensitive calculator inputs.