I have calculated the IBU value for a 1 gal batch of Sweet London Stout using multiple calculators on the internet and keep getting a value of between 70 and 92. I took a 5 gal recipe and divided it by 5 for my amounts. I thought a sweet stout should be between 20 and 40. What am I doing wrong? Will the Lactose addition bring the IBU down that much? Here are my numbers for a 1 gallon batch: 2.5 initial boil volume Initial boil Gravity: 1.048 Brewers Gold AA% 9%, Weight .4oz, time 60 min. Fuggles AA% 4.5%, Weight .2oz, time 30 min. 1.6 oz. Lactose Thanks from a frustrated newbie!