Initial gravity of wort (prior to fermentation).

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3answers
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How Does a Hydrometer Work?

I know how to use my hydrometer, and I know what numbers to look at and write down on my brewing sheets, but I'm not sure what those numbers actually represent, or even what units I should use to ...
16
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1answer
9k views

[WIKI] How Do You Calculate Original Gravity?

This is a community wiki post. Anybody with more than 100 reputation can edit it. You may also post your own answer. I get no reputation if you vote the question up or down, however, please vote up if ...
13
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1answer
844 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 ...
10
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3answers
7k 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?
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3answers
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Why was original gravity high by .010?

Recently brewed a dry stout extract kit. Boiled 5 gallons on propane. Steeped 2 lbs of roasted malt, crystal malt and flaked barley at 155-160 F. Extract was 6.6lbs of Coopers Light LME. As usual, ...
6
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2answers
246 views

Why measure gravities?

I've brewed a good dozen batches of beer from kits, extract, extract+grain, and now all-grain, and I've never measured gravities. Why measure gravity, besides to know what you're getting? Is there any ...
6
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4answers
1k views

How do you calculate how much extract to add if you don't hit your target gravity pre-boil?

Planning to do my first all-grain BIAB. If miss my target gravity after mashing, how do I figure out how much extract to add before I start the boil in order to reach that OG? I would imagine ...
5
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7answers
11k 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 ...
5
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2answers
2k 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
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1answer
321 views

Does white honey have greater effect on gravity?

A few weeks ago I made my first mead (actually a braggot). I ordered a 12 lb bucket of raw honey. To my surprise, when I opened it the honey inside was a creamy, almost foamy opaque white. It didn't ...
5
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1answer
563 views

Curiously high OG after first all-grain batch

I conquered my first all-grain batch this weekend, and after some early problems constructing my cooler mash tun, it went off without a hitch. It's a Northern Brewer all grain kit, and the recipe ...
5
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1answer
148 views

How might trub effect taking original gravity?

For the beer that I brewed this past weekend, I finally remembered to take an Original Gravity reading. Unlike my previous last three attempts, I actually had a little more than my target 1 gallon, ...
5
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2answers
667 views

Using Burnt Caramel / Brewer's Caramel in Recipes

Has anyone worked with using either burnt caramel or brewer's caramel in their recipes? I have read a few places that Fuller's is known to use this to increase the SRM of some of their product line, ...
4
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3answers
5k views

When to add DME if you miss your starting OG?

My family was very nice to me this Christmas and I got a bayou classic burner and an 32qt. pot with 2 ports and a bazooka screen as well as an immersion chiller. I had built a 10 gallon mash tun over ...
4
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2answers
581 views

Undershooting OG in all-grain brewing

My last few all-grain batches have been under the expected OG at least as far as the recipe is concerned. The beers still taste good and all, but I'd like to get my efficiency up. For example, my ...
4
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3answers
823 views

is it possible to estimate OG from nutritional information?

After many batches of beer, I've decided to try a hard cider. The recipe I have does not give a predicted OG, however all of the ingredients list the amount of sugar in the nutritional information. ...
4
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2answers
2k 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 ...
4
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1answer
82 views

How can I prime by taking the gravity of the priming fluid?

I have this great mulberry syrup I found. I want to prime with it, and I forget how to figure this out with an unknown sugar source. I see that John Palmer's "How to Brew" references measuring the ...
4
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2answers
209 views

Didn't get the expected O.G

I brewed a nano batch of single grain IPA and I don't know what I have done wrong. Before I started, I calculated the O.G. and F.G. as shown in the picture bellow. After boiling the wort from 5.3 ...
4
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2answers
3k 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 ...
4
votes
1answer
2k views

Why is my OG so low?

I brewed this recipe but substituted crystal 80 for the crystal 15. I did the full mash option, and I doubled all the ingredients and did a 10 gallon batch. I got an OG of 1.045 at 75F so adjusted ...
4
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2answers
182 views

What effect would using less LME than called for have?

I just brewed a recipe for a biggish beer that calls for 6.6 lbs of light LME and 2.75 lbs of light DME. Given that I always mess up at least one thing when I brew, I measured out 2.75 lbs of DME and ...
4
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2answers
4k views

Stuck or Slow Fermentation

So I have my first possible stuck fermentation. First, my recipe: http://hopville.com/recipe/166971/extra-special-strong-bitter-english-pale-ale-recipes/shoals-pale-ale-clone I pitched with two ...
4
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3answers
1k 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 ...
4
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3answers
1k views

Lots of trub affecting specific gravity readings?

I'm in the process of making a pretty big pumpkin beer, and just transferred to secondary. There was an incredible amount of trub -- probably 1.5 gallons out of a 5 gallon batch. I guess it was a ...
3
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2answers
610 views

Ensuring an accurate gravity reading

So I've brewed between 6-10 batches of beer at home using partial boil methods but have never managed to get accurate gravity readings. The issue I have is that my readings somehow always seem to be ...
3
votes
3answers
4k 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 ...
3
votes
1answer
178 views

Convert US to metric gravity points

How can I convert US gravity points? If, for example, a pound per gallon of sugar gives 46 gravity points (1.046 OG), how can I calcualate the corresponding value when 1kg of sugar is added to 10l of ...
3
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2answers
259 views

Can wort layering significantly affect OG reading?

A few days ago I brewed a 5-gallon recipe with the following fermentables: 8 oz Crystal 20 8 oz Crystal 40 One 3.3 lb can Briess Munich LME 2.5 lb Light LME Beer Calculus predicts an OG of 1.046. ...
3
votes
2answers
417 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 ...
3
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3answers
271 views

Undershot OG with extract brewing

Today I attempted an American IPA (Extract) full boil. I calculated the OG to be around 1085 using beersmith. The recipe included just over 11lbs of fermentables (9.15lbs LME, 1.10lb DME, 1lb corn ...
3
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3answers
199 views

Different OG than predicted

Just brewed a batch, and my OG reading is significantly different (1.051 as opposed to 1.070) than what Beercalculus.com predicted based on my recipe. Is there any possible reason for this that ...
3
votes
2answers
9k views

What to do when gravity comes out too low?

We brewed a maibock (from an extract kit) and when we checked our OG it was significantly lower than it should have been. I mean like, really, really low. We decided to attribute this to the wort not ...
2
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3answers
327 views

How does a yeast starter affect original gravity reading?

I've prepared a 1qt (~1L) yeast starter according to instructions from Wyeast.com. I didn't measure its gravity, but in theory it should be about 1.040. I am brewing a 5 gallon batch of high gravity ...
2
votes
3answers
722 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 ...
2
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2answers
199 views

should I/how do I account for temperature differences for gravity readings?

I've taken my OG at the start, and another reading last night. Only last night did I register that my OG seemed slightly low according to what the brew can suggested as typical. My OG was 1.037 (can ...
2
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1answer
3k views

How can I fix low starting gravity?

I made my third all-grain batch last weekend. I have had issues getting decent efficiency so I added a couple extra pounds of ESB malted barley (11lbs, instead of 9, and about 3lbs of specialty ...
2
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1answer
91 views

adding 1 g to 5 g recipe - keep OG the same

So i've got a 5 gallon partial mash kit(OG 1.065), and I am looking to add around a gallon to increase my yield for the session. What formula could I use to know how much extra dme to use to keep ...
2
votes
1answer
309 views

Missed my target gravity and volume by a mile

So, I know there were lots of things I could have done to repair the situation had I been prepared (lesson learned, I'll be having DME on hand from here on out), but I'm a little more interested in ...
1
vote
2answers
421 views

SG and OG quite different to values indicated on can label

very quick question: making a kit brew (Coopers Real Ale), which says a typical OG is 1.046 and FG is 1.006. Unfortunately, my OG was 1.038, and my current reading (after about 17 days) is 1.013, and ...
1
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2answers
306 views

High OG content for yeast

I had a higher than expected OG in my homebrew. It was estimated to come out to 1.060 but instead ended up at 1.076. The back of the yeast I used said that it is good in a brew of up to 1.060 OG. The ...
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2answers
214 views

My brew is taking far longer than the leaflet suggests

I'm brewing two Coopers kits at the moment - a Pilsner and an India Pale Ale. Both have a generic leaflet which suggests I should leave 6 days at 21 degrees for fermentation (which seems quite short) ...
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3answers
1k views

Formula for make up water / gravity change

If I were to put 3.5 gallons of 1.060 wort into a carboy, and use 0.5 gallons of water to top off to 4 gallons: - What could I project that gravity would be? - Anyone have a good formula, even if just ...
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2answers
62 views

Is my SG too low? [closed]

I have an SG of 1,040, and the target OG is about 1.065. I was wondering if this is too low? Should I add more water?
1
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3answers
93 views

How to add DME to the wort

I typically use LME for my wort, with no prblems, but this time I am trying a slightly bigger beer and want to add DME to boost the OG. The one time I tried adding DME to my wort, I just dumped it ...
1
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1answer
2k views

What happens when mash temperature is too low?

So yesterday we brew our second beer. As expected, some errors occured during the process, which is alright, we're learning! :) So the main problem is that we were only able to keep the mash ...
1
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1answer
294 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 ...
0
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3answers
175 views

Original gravity of ingredients

I would like to compute OG for some recipe. To do that I used to have a table, but I do not find it anynmore. Is there a table to calculate initial gravity of various ingredients in metric units?
0
votes
1answer
141 views

Liquid yeast, do need to make a starter?

I'm making mini batches with IPAs(4-5 liters/ca 1,5 gallon), and with my three first brews I've used dry yeast. On my next mini batch I'll use liquid yeast(WLP005), do I need to make a starter or is ...
0
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3answers
155 views

Trouble Reaching My OG (Pre-Boil Was OK)

Last week I brewed an Arrogant Bastard clone. My pre-boil gravity was off by .001 so I was pretty happy with that... But my OG (post-boil) was off by .009! I thought that because my pre-boil gravity ...