I am new to this hobby and have had great fun with it. I did a brew a couple weeks ago and my target batch size was 5.5 gallons. I ended up getting about 4.5 gallons. How do I calculate boil off and how do adjust for it? do i just add more water to the boil? Also I have seen a lot of talk of target gravity. Like I said I am new to the hobby and was wondering if it is a problem to get higher OG. I can understand the problem with the OG being to low but wouldn't a higher OG make the beer stronger? I know its a lot of questions but I am the only one of my friends that is into this hobby and don't really have anybody to corner and question/ mentor with. Thanks for the help!