Ok, I use this website all the time to help me make conversions... for example, just how many teaspoons are there in a 20 oz bottle of water? Not that I would really want that particular conversion, but you'll for sure want to mark this site http://recipes.chef2chef.net/conversion/

Just in case you're wondering, there are 192 tsp in 1 quart (32 oz) and120 in a 20 oz bottle