Coldbreak Brewing HERMS Giveaway!

HomeBrewSupply AMCYL Brew Kettle Giveaway!


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Specific Gravity Question
Reply
 
Thread Tools
Old 03-17-2010, 02:53 AM   #1
basie
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Maryland
Posts: 7
Default Specific Gravity Question

Let's say I have 4.5 gallons of wort with an specific gravity of 1.064. If I were to add .5 gallons of water to that wort before adding the yeast, what is the new specific gravity and O.G. of this beer? Bonus points if you show your work.

Thanks HBTers!


basie is offline
 
Reply With Quote
Old 03-17-2010, 03:15 AM   #2
Pappers_
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
Pappers_'s Avatar
Recipes 
 
Join Date: Jan 2009
Location: Chicago
Posts: 12,788
Liked 1257 Times on 865 Posts
Likes Given: 2410

Default

1.058

I didn't do any hand calculations - there is a dilution tool built into Beersmith. You should check it out - you can download it for free and use it during a trial period before purchasing it. Its really great, and Brad, the guy behind it, provides a great service. So many uses, including your question.



Pappers_ is offline
 
Reply With Quote
Old 03-17-2010, 03:17 AM   #3
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ajf's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Long Island
Posts: 4,643
Liked 103 Times on 97 Posts
Likes Given: 39

Default

If you start with 4.5g at 1.064, you have 288 gravity points. That's 4.5 (gallons) * 64 (the meaningful part of 1.064)
Now you add 0.5g water (with an OG of 1.00) so you have 5 gallons, but the same number of gravity points, so divide 288 (gravity points) by 5 (total gallons) and you get 57.6 Convert that back to specific gravity, and you get 1.0576
Consider a gravity point as (the specific gravity - 1.000) * 1000 if you want to be mathematically correct.

-a.
__________________
There are only 10 types of people in this world. Those that understand binary, and those that don't.
ajf is offline
 
Reply With Quote
Old 03-17-2010, 03:31 AM   #4
basie
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Location: Maryland
Posts: 7
Default

Thanks Pappers and ajf!

Quote:
Originally Posted by Pappers View Post
1.058

there is a dilution tool built into Beersmith. You should check it out - you can download it for free and use it during a trial period before purchasing it. Its really great, and Brad, the guy behind it, provides a great service. So many uses, including your question.
Actually, I've paid for a registered copy of BeerSmith, and I agree that it's really great. Every time I use it I learn something new. I didn't know about the dilution tool, so thanks for the heads-up!
basie is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Specific Gravity Question NorthRiverS Extract Brewing 3 02-09-2010 09:02 PM
Specific Gravity question Toivo All Grain & Partial Mash Brewing 4 01-20-2010 11:13 PM
specific gravity question coastwx Beginners Beer Brewing Forum 3 12-12-2009 07:20 PM
specific gravity question beerman23 Beginners Beer Brewing Forum 2 08-28-2008 02:00 AM
Specific Gravity question Matt Beginners Beer Brewing Forum 1 09-23-2005 06:06 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS