This is an old topic. The conversion method is simply an Excel formula… and there are many web sites discussing such. I think there was even a recent topic or post in this forum. Search for keywords like Excel, etc. with the “most recent” sorting selection
EDIT - here it is…
Meanwhile there has since been a new widget called the Reports widget. Please check it out in your up to date App, as the current CSV export will reportedly be discontinued and removed…