Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Recipes/Ingredients > Recipe Software & Calculators - Accurate or not?
Reply
 
LinkBack Thread Tools
Old 11-11-2009, 06:55 PM   #1
Graeme
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Dublin, Ireland
Posts: 238
Default Recipe Software & Calculators - Accurate or not?

I've never used brewing software consistently. I've used Beertools trial amongst others. I recently discovered hopville.com which I found to be hugely beneficial, however I often wonder how acurate certain aspects of these thing are. Granted it's free to use so I'm in no real position to complain too much, but for example a recipe I put through hopeville for an IPA came out at 55IBU's. I put the same thing through a bitterness calculator on tastybrew.com and it came out at over 70IBU's! These things are important and you always want better control over your beer. I'll be moving in to all grain soon, perhaps then I'll actually purchase a membership to promash or beertools

__________________
Graeme is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:04 PM   #2
Suthrncomfrt1884
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2009
Location: Rockford, Illinois
Posts: 4,079
Liked 23 Times on 22 Posts
Likes Given: 3

Default

Did you adjust the AA% of the hops? Most programs are pretty accurate. I use BeerTools Pro as my main program and have found no issues with it.

__________________
He who drinks beer sleeps well. He who sleeps well cannot sin. He who does not sin goes to heaven.

Another HERMS rig...
Suthrncomfrt1884 is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:06 PM   #3
Graeme
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Dublin, Ireland
Posts: 238
Default

Yeah I adjusted all my AA% of the hops on both, same times, same size batch and OG, it's quite strange

__________________
Graeme is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:07 PM   #4
mysterio
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2005
Location: Glasgow, Scotland
Posts: 696
Liked 2 Times on 2 Posts

Default

Remember these things are basically fancy spreadsheets. The IBU calculator is based on a formula. There are lots of different formulas. It is quite possible that one gave you 55 IBUs and another 70 IBUs. Neither is 'wrong', as estimating it depends on dozens of factors. Maybe you get that beer measured at a lab and it's 80 IBUs for example (OK, at this point the formulae are wrong). You just have to go by taste and use the calculator as a guideline. Does 55 calculated IBUs taste too bitter? Scale it back next time, or try a different formula. Once you've picked a formula that works for your tastes, stick with it.

FWIW I use the Tinseth formula, I find it fairly accurate.

__________________
Brewlog

Last edited by mysterio; 11-11-2009 at 07:09 PM.
mysterio is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:10 PM   #5
JLem
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Attleboro, MA
Posts: 3,641
Liked 168 Times on 148 Posts
Likes Given: 4

Default

There are also several different formulas for estimating IBUs (e.g. Rager, Tinseth, Garetz). Each one will give you a different value. Check the software settings.

JLem is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:13 PM   #6
Graeme
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Dublin, Ireland
Posts: 238
Default

Yeah you're right Mysterio, allot of factors involved really. 55 to me is perfect, in fact 70+ is fine, I'm a big IPA fan, it's just I'm brewing a Bells Two Hearted Clone, and 55 is sort of spot on for this beer. As you said, when I brew it I'll find out

__________________
Graeme is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:16 PM   #7
Graeme
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Dublin, Ireland
Posts: 238
Default

Turns out tastybrew use the Tinseth formula, however hopville doesnt specify

__________________
Graeme is offline
 
Reply With Quote Quick reply to this message
Old 11-11-2009, 07:20 PM   #8
Graeme
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Dublin, Ireland
Posts: 238
Default

Disregard my last post, hopville actually gives you a choice. Also, I needed to adjust my Avg liters for 60minutes. Sorry guys, my mistake

__________________
Graeme is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calculating IBU's. Is Brewing software accurate enough, or is my recipe off? Graeme Extract Brewing 14 09-19-2009 12:05 AM
recipe/brew calculators axr Recipes/Ingredients 1 07-08-2009 02:32 AM
Most accurate brewing software Blindguardian Brewing Software 17 05-28-2009 01:48 PM
Free recipe generating software or website? Jaxford Extract Brewing 11 01-11-2009 09:19 PM
Recipe Software Eric Stephenson General Chit Chat 4 10-04-2005 01:52 AM