After reading many posts on here asking how long we should leave our brews in the bottle for carbonating, I have found that the typical answer given is 3 weeks. I just opened up a few IPA's that I've had in the bottle for six days at 58-64 degrees and they are all very carbonated. I used the typical 3/4c in 2c water solution in 5 gallons of 5.8% brew. The reason most people answer 3 weeks is due to the fact that they are also looking to age/condition their brew. Since I was making an IPA, I had already conditioned it for a week while it was dry hopping, and then dry hopped once again at a cooler temperature prior to bottling. So basically, 3 weeks is the short answer to properly giving your brew some time to age, but if you're solely wondering how long it takes to carbonate a beer in the bottle, it can easily take less than a week. As I stated, these were fully carbonated within six days, at lower than usual temperatures of 58-64 degrees (which in theory would require a longer duration to carbonate). I hope this helps clarify things a bit.