Scaling Down Recipes - Home Brew Forums

 Home Brew Forums > Scaling Down Recipes

10-12-2009, 03:07 PM   #1
Graeme
Recipes

Mar 2009
Dublin, Ireland
Posts: 237

I am thinking of making a few small batches over the coming weeks, mainly recipes that I want to try out or test if you will, particularly a Weiss for my girlfriend, as I'm not that huge a fan of the style. I've been doing partial mashing for my last two brews with great results so I'll probably go 'all grain' for this seen as thought it will be on a small scale (around the 3 gallon mark, maybe a bit less). anyways, I'm awful at working stuff out like this... Is there a formula to scale down recipes like this?

Cheers!
G

10-12-2009, 03:09 PM   #2
Yuri_Rage
Gritty.

Recipes

Jul 2006
Southwest
Posts: 14,296
Liked 814 Times on 514 Posts

I used to think that scaling recipes was some kind of cosmic science. In reality, simply multiplying all of the amounts by 3/5 (0.6) will work fine when scaling a 5 gallon batch down to 3 gallons.
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10-12-2009, 04:52 PM   #3
thesanch
Recipes

Jan 2009
Tucson
Posts: 252
Liked 4 Times on 3 Posts

I'm planning on doing 3 gallon all grain batches until I can get a new pot. Anyway, if you use Beersmith, it has a button to scale the recipes down.

10-12-2009, 04:54 PM   #4
weirdboy
Recipes

May 2009
Los Angeles
Posts: 8,219
Liked 493 Times on 398 Posts

Quote:
 Originally Posted by Yuri_Rage I used to think that scaling recipes was some kind of cosmic science. In reality, simply multiplying all of the amounts by 3/5 (0.6) will work fine when scaling a 5 gallon batch down to 3 gallons.
This doesn't quite work because you boil off fairly constant amounts of water during your boil. So, your sparge volumes at least tend to be different than just simple scaling.

Regarding Beer Smith, I tend to just rewrite my recipe for the smaller volumes rather than attempting to have Beer Smith scale stuff, because I think there's some kind of bug there where it will scale up OK usually, but scaling down gets wonky, at least in my experience. Also, if I rewrite it I can specify stuff like 1/4 pounds instead of ending up with crap like 0.38 pounds of crystal.