Visit Products > Inventory summary.
This report shows you the total quantity and value of all your in stock items across all your warehouses. Use the filters to view stock by warehouse, by category, by product type, or a combination of these. Each item will be listed only once to provide the total quantity and value for that item whether they were purchased at the same price or not. The overall total displayed at the bottom of the report is for the items displayed on screen only. To display more rows use the filters to increase the number of results.
This report will show items which are in stock at the time it is viewed. It's also possible to filter to an historic date to view the inventory summary at that point.