Not much more than a 1/4 ounce would be my guess, but I've never kept track. I've got a big stash of around 15 strains on hand, so I just rotate around taking a little at a time from each jar. I have a busy job and family, so one or two vape sessions is all I get most days. My consumption dropped dramatically when I switched from smoking to vaping. It's amazing how many big vapor hits you can get out of a small amount of bud.