Hey Steve, I cannot give you an exact answer, but the small bottle has 37 mL, given the average spray is about 0.2 mL you should get at least 185 sprays. That should last for the duration of any weekend trip for you and some buddies. The larger container you can use to refill, I have still had my little bottle for some time without needing refilling. Bottom line, the small bottle will last a long time!