I recently stumbled upon this website and found it very helpful when cellaring. Basically you enter each tin/jar of bulk that you have in your cellar and it keeps track of how old it is and other useful information. It also asks how many bowls you smoke per an ounce, and bowls a month and will tell you how long your stash will last you at your current smoking rate. I am just beginning but for those of you with an extensive collection I can see how it would be more helpful. It is free so check it out.
Link is here.
Link is here.