How would adding top up water effect the Ibu's of the beer. A specific example is that I had done a 8 gallon boil which I calculated at 64 Ibu's and 1.069 post boil based on beersmith calculation for a 5.5 gallon batch. I had a very bad brew day and only ended up with 3.75 gallons of useable wort so I topped of with 1.75 gallons of fresh water. I understand how to calculate my dillution for the SG but what about my Ibu's as I'm sure that is effected as well.
Is this formula possibly correct ?
(Ibu's x wot collected) + (fresh water addded) / total volume of fermenter
(64 x 3.75 ) + (1.75 ) / 5.5
240 + 1.75 = 241.75 / 5.5 = 44 Ibu's
I'm really winging that formula but am I on track or can someone tell me a way to calculate this problem.
Is this formula possibly correct ?
(Ibu's x wot collected) + (fresh water addded) / total volume of fermenter
(64 x 3.75 ) + (1.75 ) / 5.5
240 + 1.75 = 241.75 / 5.5 = 44 Ibu's
I'm really winging that formula but am I on track or can someone tell me a way to calculate this problem.