What you enter
Heights, selected sex and age are used for calculations in your browser. This version of the website does not send these entries or calculated results to an application server, place them in a page URL or save them in cookies or browser storage.
Refreshing or closing the page clears the calculator state. We do not require accounts, names, birthdays or payment details. We do not operate a database of children’s measurements.
What happens when you visit
Your browser requests the website’s pages, fonts and code from our hosting provider. As with other websites, the hosting provider may process technical information such as your IP address, requested URL and browser details to serve and secure the website. These requests do not contain the calculator values you enter.
We do not include advertising scripts, third-party analytics, session recording or marketing cookies in this version. Our typefaces are provided by your device; loading a page does not request fonts from an external font service.
Links to sources such as the CDC open external websites. If you follow them, those sites process your visit under their own privacy policies. We do not send calculator values in those links.
Printing and saving results
When you choose Print / save PDF, your browser handles the print dialog and destination. Only save or share a result when you are comfortable with the information it contains.
This policy reflects the current version of the site. If accounts, saved growth records, analytics or advertising are introduced, the policy and applicable user choices will be updated before those features are enabled.