Contact

howtallai is run by one independent developer. Email is the way to reach the site.

Replies usually take a few days.

What you can write about

A value that looks wrong. Include the page address and, if you checked it, the row of the source file it should match. Corrections are the most useful mail the site gets.
The height calculator. A result that seems off, a question about how it is calculated, or an age or situation it handles badly. Include the inputs only if you are comfortable sharing them.
Privacy requests. Asking what data is held about you, or asking for it to be deleted. The privacy policy lists what is stored.
Anything else about the site, such as a page that is hard to read on your device or a topic the guides do not cover.

What email cannot cover

The site cannot assess a particular child's growth or answer medical questions by email. If you are concerned about a child's growth or puberty, speak to a pediatrician or family doctor.

Who runs the site, where its data comes from and its limits are on the about page; the calculations are on the data and method page.