Well my first batch is fermenting away and I’m already thinking about my next batch.
Due to space limitations I would like this next batch to be 2.5 to 3 gallons. I know that some volume will be lost during the boiling process, so I need to start off with more than 2.5 to 3 gallons.
My question is: how do you determine the pre-boil volume so that you are at or near your planned final volume after the boil?
Is there a rule of thumb or formula that is used, or do I need to use some kind of brewing software?