Electric Brewing Supply 30A BCS Giveaway!


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Calculating OG
Reply
 
LinkBack Thread Tools
Old 02-10-2010, 08:02 PM   #1
rtbrews
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Brooklyn, NY
Posts: 112
Liked 4 Times on 4 Posts

Default Calculating OG

When calculating the OG of my wort using my hydrometer, how can I adjust for the affects of air? and are there other factors that could be affecting my OG reading that I should account for as well?

__________________
rtbrews is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 08:17 PM   #2
jkarp
Beer Herder
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jkarp's Avatar
Recipes 
 
Join Date: Jun 2008
Location: Elizabeth, CO
Posts: 2,105
Liked 33 Times on 29 Posts
Likes Given: 4

Default

affects of air?

Just put the hydrometer in the sample, spin, and take a reading. Adjust as necessary for the sample temperature.

__________________
jkarp is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 08:17 PM   #3
Doc Robinson
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Fishers, IN
Posts: 2,386
Liked 12 Times on 10 Posts
Likes Given: 1

Default

Temperature.

__________________
Doc Robinson is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 08:18 PM   #4
maida7
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Asheville, NC
Posts: 2,817
Liked 44 Times on 38 Posts

Default

what effects of air?

You should correct the reading for the temp. Most are calibrated to either 60F or 68F

__________________
maida7 is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 09:19 PM   #5
rtbrews
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Brooklyn, NY
Posts: 112
Liked 4 Times on 4 Posts

Default

ok, thank you very much

__________________
rtbrews is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 09:28 PM   #6
JiveTurkey
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2009
Location: Corvallis (Heart of the [Willamette] Valley), Oregon
Posts: 191
Liked 1 Times on 1 Posts

Default

If partial boil extract brewing, know that it is difficult to completely mix the boiled wort with the top-off water, which will give you a false reading on the hydrometer.

It is safe to assume the calculated OG is more accurate than the measured OG if you followed the recipe directions correctly (right amount of extract and batch size).

Once it starts fermenting, it will all mix together, then you can trust your hydrometer readings.

__________________
Aging for 1 Year: #1 LHBS Standard (Dry) Stout
In bottles: #2 Honing Wit (Belgian Wit Bier w/honey); #3 Be Hoppy, Not Bitter ("Oregon" Pale Ale: APA using Oregon-inspired ingredients and lots of late-addition/dry-hops); #4 American Red-Head (Irish Red made from American ingredients); #5 Student Power Orange Ale (Orange-hued amber ale for a wedding)
Primary: [n/a]
On deck: [Thinking about it]
JiveTurkey is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 09:39 PM   #7
rtbrews
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Brooklyn, NY
Posts: 112
Liked 4 Times on 4 Posts

Default

Is the reading usually off by a considerable amount or is there a better way to measure it? I was hoping to make a few brews without recipes and be able to accurately calculate my OG before fermentation.

__________________
rtbrews is offline
 
Reply With Quote Quick reply to this message
Old 02-10-2010, 09:46 PM   #8
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,938
Liked 57 Times on 50 Posts
Likes Given: 4

Default

beersmith my friend

__________________
COLObrewer 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 OG motobrewer Extract Brewing 5 11-03-2009 06:41 PM
Calculating ABV Fenster General Beer Discussion 4 12-14-2008 01:27 AM
Calculating FG Lucky Dog Brewing General Techniques 3 07-24-2008 03:46 PM
Calculating Efficiency hialtitude General Techniques 6 09-10-2007 05:52 PM
Calculating OG? anthrobe Extract Brewing 6 12-23-2005 01:19 AM