You could pass it, but it's a toss up. Most common answer is around a month, but it could be more or less, depending on your recent smoking habits, your body composition/metabolism, and your level of activity. And maybe other shit too... Whatever you do, it's important to drink A LOT of water. Drink constantly...and then some people take a vitamin (b12?) to turn their diluted piss yellow again. Some people recommend cranberry juice too. I've never had to beat one, so I don't know which supplements are trusted, but if I find one that people like, I'll mention it.