Talk to us.

The fastest way to reach us is email: dave@thefatbook.com.

Corrections and data errors

If a number on this site looks wrong, send the page URL and what you found instead. We treat the index like a published dataset. A confirmed error gets fixed at the source, then the fix ships to every page that uses that number.

Privacy requests

Want a calculator submission or an uploaded estimate deleted? Tell us the page you used, roughly when, and the file name or contact info you submitted, enough for us to find the record. What we store is spelled out in the privacy policy.

Press and citations

Cite any figure on the site. All we ask is attribution to TheFatBook and a link to the page it came from. The math behind each number lives on the methodology page; if something's missing there, email us and we'll dig it out.