How do I scale a 5 gallon recipe to a 6 gallon yield? (extract)

skahorse · 10-18-2009, 01:02 AM

Hey all-

I'm new here, thanks for all the information!

Quick question; How do I up a 5 gallon recipe to 6 gallons? Is it as simple as increasing everything by 20%?

Here's the recipe I want to make: http://www.homebrewtalk.com/f69/all-amarillo-ipa-28517/

But I only have my 6 gallon setup available right now (normally used for wine).

The recipe calls for 7lbs DME, so I'll up it to roughly 8.5lbs?

8oz of 40L Crystal, up to 10oz?

Hop schedule is
1.5oz - 60 Min
1oz - 15 Min
1oz - 5 Min
.5oz - flameout

Should I go with (or do I even up the hops?)
2.0oz
1.25oz
1.25oz
.75oz

I plan on starting the boil with 4.5 gallons and adding the remaining 2-2.5gals when it goes into primary.

So, am I on the right track?

EDIT: I've been HBing off and on for a few years, but never really paid attention to the math or science of it all... If i'm off base, and someone would be so kind to walk through the math/science of the actual process, that would be awesome! Thanks.

Thanks,
--Ska

**Nugent** · 10-18-2009, 02:24 AM

Just multiply everything by 1.2.

When you increase volume, you increase everything. If you just want to increase gravity, just increase your base (extract).

That's what I do, FWIW.

**rocketman768** · 10-18-2009, 02:32 AM

Notice 1.2 = 6/5... just in case you didn't catch that. Same would be true if you were scaling down to 3 gal for example...3/5.

**ChshreCat** · 10-18-2009, 02:33 AM

Add an extra gallon of extract to make up for the volume!

No, really, Nugent's right.

But I like my way better.

**Nugent** · 10-18-2009, 03:07 AM

Quote:

Originally Posted by ChshreCat

Add an extra gallon of extract to make up for the volume!

No, really, Nugent's right.

But I like my way better.

Ha, ha

MBasile · 10-18-2009, 03:14 AM

If you get Beersmith (only $20) it has an option to scale recipes to whatever size you want (there might be some size limit, but any size a homebrewer can handle anyways). It also lets you convert recipes between all-grain, partial mash, and extract.

**Nugent** · 10-18-2009, 03:23 AM

Quote:

Originally Posted by MBasile

If you get Beersmith (only $20) it has an option to scale recipes to whatever size you want (there might be some size limit, but any size a homebrewer can handle anyways). It also lets you convert recipes between all-grain, partial mash, and extract.

+1. It helps the math-deficient like me.

MBasile · 10-18-2009, 03:36 AM

Quote:

Originally Posted by Nugent

+1. It helps the math-deficient like me.

and me!

789