LeftyMcGee
Active Member
I downloaded Beersmith and have been trying it out. I have noticed the amount of hops needed to meet a specific style is dependent on the boil volume. I have formulated the same recipe on Beersmith, TastyBrew's Calc & BeerCalculus. When I change the boil volume on each to 2 gallons, they differ in the amount of hops required to meet a specific IBU. On an APA I was designing, Beersmith required 1/2oz (bittering hops / 60min) more than BeerCalculus and BeerCalculus required 1/2oz more than TastyBrew. It seemed like TastyBrew's recipe calc didn't even change the calculated IBU's when I changed my boil volume to 2 gallons.
I am new to homebrewing, but it seems to me that calculating IBUs is very mathematical and each of these resources should come up with fairly similar numbers. They all seemed to calculate the OG and FG within a fairly close range.
I was wondering if anyone could shed some light on why these three resources differ in their calculations. It seems like 1/2oz to 1oz difference in a bittering hop with 12.2%AA would make a pretty substantial difference in the taste of the brew.
I am new to homebrewing, but it seems to me that calculating IBUs is very mathematical and each of these resources should come up with fairly similar numbers. They all seemed to calculate the OG and FG within a fairly close range.
I was wondering if anyone could shed some light on why these three resources differ in their calculations. It seems like 1/2oz to 1oz difference in a bittering hop with 12.2%AA would make a pretty substantial difference in the taste of the brew.