Questions tagged [original-gravity]

Initial gravity of wort (prior to fermentation).

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8
votes
2answers
39k views

How to calculate alcohol without OG reading?

I tested 'brewing' a cider for the first time a few weeks ago. Since this process was so extremely different from what I am used to with brewing beers I completely forgot to take an OG reading. To be ...
7
votes
2answers
3k views

What causes Original Gravity to be lower than it should be?

I am an extract brewer and every brew I have done the OG was lower than the intended OG, (my OG is always lower than the recipe's OG). For example I brewed the stout recipe below from beertools.com ...
7
votes
7answers
23k views

Why is my starting gravity low?

In the fall of 2011 I made the leap from extract/partial kits to all-grain kits. I'm enjoying AG, but my SG is continuously below the expected. I have brewed 5 AG kits and 4 have had a low SG. My ...
14
votes
1answer
1k views

Original Gravity: Calculate or measure

I've been told that for extract brewing it's best to simply calculate the original gravity instead of measuring it. Is this correct? What are the pros/cons either way? What about with extract+...
6
votes
2answers
6k views

Why would OG be significantly higher than predicted?

I know there are several questions on the forum about OG being lower than predicted. Please bear with me though. I'm at a loss. I just brewed a straightforward extract wheat beer recipe. The ...
5
votes
3answers
6k views

Why is our Original Gravity low?

When brewing from an extract kit we always seem to be low in the Original Gravity department. It's usually not a lot -- something like 1.055 instead of 1.060. What might be causing this to happen? Is ...
5
votes
3answers
3k views

Brewed an Oatmeal Stout and the gravity did not drop as much as predicted, should I re-pitch or add yeast nutrients/energizer?

I just brewed an oatmeal stout see recipe details here and I have a question about missing Orignal and/or Final gravities. The OG was supposed to be 1.061 and the FG 1.016. I brewed and got an OG or ...
3
votes
3answers
2k views

Hydrometer reading interference

When brewing an IPA about a week ago, my starting gravity reading came out to be 1.12 - significantly higher than the listed target of 1.07 on the recipe. I had suspicions of error at the time which I ...
13
votes
4answers
18k views

Didn't hit gravity--how to calculate how much malt extract to add to the fermenter?

Lets say you were aiming for 1.047 but only hit 1.032. In a 5 gallon batch, how much malt extract would you need to add to the fermenter to bring it up to the desired gravity?
11
votes
3answers
2k views

Diluting beer after 11 hours of fermentation. What to expect?

Ended up with too high gravity wort. Since I was not prepared for this I didn't have enough sterile water to dilute the wort. I ended up pitching the yeast anyway and adding sterile water at 11 hours ...
4
votes
2answers
774 views

Does a malt "late addition" affect OG?

I'm following a recipe from a book for an IPA that calls for the following (simplified) steps: Boil water (3G/11L) Add Light DME (1lb/450g) & return to boil Add hops At 45 mins, add LME (6.6lb/...
1
vote
1answer
387 views

Can I retroactively deterimine my OG with a refractometer?

Brewed a big Belgian beer last week. And using my refractometer (poorly, as it turns out), I wasn't able to get a solid reading of the OG. Now a week later I've taken a sample of the beer and want to ...