Is there a link available to the AEM Assets Sizing Calculator? There was one provided as part of a lab during Summit 2017 but it doesn't appear that this tool is available online to use?
I believe you are referring to this <host>:<port>/libs/granite/operations/content/healthreports/healthreportlist.html
You can reach here by AEM>Tools>Operations>Health Reports. I am assuming you are using AEM 6.3.
Checking this with Internal Team.
I read that document. What I was referencing was a webpage that was shown during Summit that would also help estimate not just disk space but CPU, Memory etc.. for server configurations.
Here is a doc topic that may help -- Assets Sizing Guide