Contact

The fastest way to reach us is email:

hello@kdp.cool

We read everything — bug reports, feature requests, converter suggestions, and corrections to math or reference data are all welcome. Replies usually within a few days.

Found a bug?

Source code is on GitHub. Open an issue with the page URL, what you entered, what you expected, and what you got. Screenshots help.

Looking for a converter we don't have?

Email or open a GitHub issue. We prioritize converters that get high search volume and have authoritative source data we can cite (when applicable).

What to include

For a conversion bug, include the page URL, the original value, the source unit, the target unit, and any date or location that affects the result. Time-zone reports should include the city or IANA time zone name plus the exact date and time because daylight saving rules can change the answer.

For a new converter request, describe the real task behind it. A useful converter should have clear units, a stable formula or data source, and a result that can be explained on the page.

Privacy note

Please avoid sending private travel plans, addresses, customer records, shipping documents, or other sensitive data. Use representative example values when the exact value is not needed to reproduce the issue.