Forgot to take my OG reading

[hoosier2137]

I just got done brewing and realized I forgot to take my OG reading. I do however have my pre boil gravity and didn't know if there was a way to figure it out from that and how much wort I boiled off? I'm usually good about keeping notes on my temperatures, pH, and everything else, it just slipped my mind I guess.

 

[airbrett]

I forgot mine as well as this is my first brew. There is a calculator here that may help:

http://www.brewersfriend.com/allgrain-ogfg/

 

[FirstAidBrewing]

Not sure about figuring out your OG from the pre-boil gravity but if nothing else, I'd say take a sanitary reading ASAP to get a close idea. There may be some. Actually, just found this:

http://onebeer.net/boilcalc.shtml

 

[Qhrumphf]

Yes, if you have an accurate preboil gravity reading and preboil volume, and then accurate post-boil volume, you can indeed determine your OG.

If this was extract though, may not be worth bothering about. If the volume was right and the fermentables were right, your gravity will be right. If the volume was wrong, then different story.

Using gravity as "gravity points" (ie use 1.046 as 46), preboil gravity x preboil volume = postboil gravity x postboil volume. Input your data and solve for gravity. There'll be a margin of error if you don't factor in thermal expansion of the wort, but it'll be very, very close.

 

[ChefRex]

I say don't worry about it, you'll make beer and probably good beer

 

[Knkbrand]

I say don't worry about it, you'll make beer and probably good beer

I would have to agree. I have a friend who never takes gravity readings...he always said, "what good are they, no matter what the numbers say, I am still drinking my beer!" In the end you will have beer.

 

[grrickar]

Until recently I never had a hydrometer, I just left it to chance. As the other posters said, I'm drinking it either way...

Now that I am getting 'fancy' and doing AG, I have a hydro and a refractometer :fro:

 

[GHBWNY]

Gravities as they relate to final ABV can often be construed to be a matter of "bragging rights", like, "hey, look, I brewed a beer with a high alcohol content. Aren't you impressed?". Except, it takes no more effort or skill to do that than to brew a delicious 3.5 session ale. ABV will be what it will be; be sure your focus is on taste and balance no matter what the ABV is. None of your buds are going to be impressed with a 9.5 IIPA that tastes like pond scum.

 

[Qhrumphf]

Gravities as they relate to final ABV can often be construed to be a matter of "bragging rights", like, "hey, look, I brewed a beer with a high alcohol content. Aren't you impressed?". Except, it takes no more effort or skill to do that than to brew a delicious 3.5 session ale. ABV will be what it will be; be sure your focus is on taste and balance no matter what the ABV is. None of your buds are going to be impressed with a 9.5 IIPA that tastes like pond scum.

All true.

However, gravity can also be used to dial in consistency in your brewhouse. That's the factor I care about.

And for the record, it takes more skill to brew that 3.5% session ale

 

[ChefRex]

All true.

However, gravity can also be used to dial in consistency in your brewhouse. That's the factor I care about.

And for the record, it takes more skill to brew that 3.5% session ale

Should I call Remmy?

 

[Qhrumphf]

Should I call Remmy?

Pretty sure he's too smacked to read right now

 

[hoosier2137]

It was all grain. I'll check out those websites in a minute. The only reason I take readings is so I can accurately brew whatever beer I'm brewing, again. Thanks a lot for all the input guys!

 

[stpug]

This should do it:

preboil gravity points * preboil volume
---------------------------------------    =   postboil gravity points
           postboil volume

Gravity points are: 1.056