2
votes
2answers
159 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 ...
3
votes
2answers
356 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 ...
6
votes
4answers
906 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
votes
1answer
269 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 ...
3
votes
2answers
383 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 ...
2
votes
1answer
67 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 ...
4
votes
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 ...
6
votes
2answers
242 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 ...
10
votes
3answers
6k 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?
5
votes
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 ...
16
votes
1answer
8k 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 ...
3
votes
3answers
195 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 ...
4
votes
2answers
1k 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 ...