.
.
Hi,
I don't have a formula, but the infrastructure guide contains a detailed example:
Chapter
4.2. Estimation of WEBCON BPS database size
https://community.webcon.com/community/public/posts/post/webcon-bps-2021-infrastructure-guide/246
On the other hand, you have the demo application so you could click it through a few times and calculate the growth per new instance. This could provide a more reliable value.
Best regards,
Daniel