I got preboil OG.. then broke hydrometer need help calculating post boil og

[beerbeerbeer123]

As mentioned in the title i was able to get a pre boil gravity ..It was 1044..but my hydrometer fell broke before i and got a chance to take a post boil gravity reading ..Is there any calculators that are accurate?..thank you

 

[gcdowd]

Do you know how much your volume changed?

 

[amandabab]

Is there any calculators that are accurate?..thank you

Nope. your brewing by the force on this batch. just carry on normally.

 

[gcdowd]

Nope. your brewing by the force on this batch. just carry on normally.

Why do you say that? If he knows his pre boil volume and OG, and his post boil volume, it's easy to calculate

 

[beerbeerbeer123]

5.5 gallons pre boil OG 1034..I made a mistake on my OP..its 1034 not 1044... boil volume was 7.5 gallons

 

[amandabab]

If he knows his pre boil volume and OG, and his post boil volume, it's easy to calculate

its easy to guess

 

[gcdowd]

It's no guess for some. I take very good measurements of both pre boil and post boil volumes. Even if he can get close, that would be close enough

 

[beerbeerbeer123]

Alright.. what online calculator is recommended? thank you

 

[TrickyDick]

If you are going to buy a new hydrometer, and use the tub it comes in as a poor mans flask, you could save enough wort from you fermenter before you pitch so you can take a reading with a hydrometer. If you we're cautious and used a sanitized Tupperware container to seal it in until you could get a new hydrometer, and if you sanitized the new hydrometer and flask, you could probably even add the few ounces back into the primary if you liked.

TD

 

[gcdowd]

So you don't know you're pre boil and post boil volumes?

 

[beerbeerbeer123]

So you don't know you're pre boil and post boil volumes?

preboil 7.5 gallons...post boil 5.5 gallons

 

[TyTanium]

Preboil Volume x Preboil Gravity = Postboil Volume x Postboil Gravity
assuming no losses from splashing or absorption

I also assume you measured your pre-boil volume at hot temps, so I corrected the volume for thermal expansion (roughly 1 qt):

7.25 x 34 / 5.5 = 45

So a decent estimate is 1.045

 

[beerbeerbeer123]

Preboil Volume x Preboil Gravity = Postboil Volume x Postboil Gravity
assuming no losses from splashing or absorption

I also assume you measured your pre-boil volume at hot temps, so the volume should be corrected for thermal expansion...I assumed 1 quart.

7.25 x 34 / 5.5 = 45

So a decent estimate is 1.045

damn i undershot by alot then that sux.. but thank you

 

[TrickyDick]

I'm shocked. 1.044 SG at 7.25 gal down to 5.5 and only calculated at 1.045 post boil. I'm skeptic


TD

 

[zmanzorro]

Preboil Volume x Preboil Gravity = Postboil Volume x Postboil Gravity
assuming no losses from splashing or absorption

I also assume you measured your pre-boil volume at hot temps, so I corrected the volume for thermal expansion (roughly 1 qt):

7.25 x 34 / 5.5 = 45

So a decent estimate is 1.045

Beat me to it, but I got the same number.

 

[TrickyDick]

I'm shocked. 1.044 SG at 7.25 gal down to 5.5 and only calculated at 1.045 post boil. I'm skeptic

TD

Oops! Forgot you mentioned error in original post.. No longer skeptic

 

[beerbeerbeer123]

Wow a 1045 IPA..maybe next time i will just throw some water in a keg and carbonate it much less work..but thanks all

 

[temple240]

Wow a 1045 IPA..maybe next time i will just throw some water in a keg and carbonate it much less work..but thanks all

Sorry if this is obvious, did you take your preboil reading at the proper temperature? This was an ag brew?

 

[gcdowd]

I thought the pre boil gravity was 1044. It's that is the case, your post boil gravity is 1060

Edit: just noticed the error

 

[beerbeerbeer123]

Sorry if this is obvious, did you take your preboil reading at the proper temperature? This was an ag brew?

yeah i took it at about 72*F and used an online hydrometer temp correcter

 

[beerbeerbeer123]

I thought the pre boil gravity was 1044. It's that is the case, your post boil gravity is 1060

Edit: just noticed the error

Man i wish..can i boil up a pound of DME and dump it in?

 

[passedpawn]

An egg floats in about 1.075. So if won't float an egg, it's under that. Hope that helps