Help verify volume conversion please

[shelbymedic]

Can y'all verify that I converted everything correctly? I found this recipe on brewmaster and used their converter.

Original recipe:

Anchor Porter Clone

Style: Robust PorterOG: 1.051
Type: All GrainFG: 1.015
Rating: 4.0ABV: 4.72 %
Calories: 168IBU's: 45.47
Efficiency: 74 %Boil Size: 2.09 Gal
Color: 45.3 SRM Batch Size: 1.63 Gal
Preboil OG: 1.052Boil Time: 60 minutes

Fermentation Steps
NameDays / Temp
Primary7 days @ 68.0°F
Secondary7 days @ 72.0°F
Bottle Condition14 days @ 74.0°F

Grains & Adjuncts
AmountPercentageNameTimeGravity
52.00 ozs76.32 %Pale Malt (2 Row) US60 mins1.036
6.00 ozs8.81 %Chocolate Malt60 mins1.028
3.00 ozs4.40 %Caramel/Crystal Malt - 80L60 mins1.034
3.00 ozs4.40 %Caramel/Crystal Malt -120L60 mins1.033
2.00 ozs2.94 %Cara-Pils/Dextrine60 mins1.033
1.50 ozs2.20 %Carafa III60 mins1.032
0.63 ozs0.92 %Roasted Barley60 mins1.025

Hops
AmountIBU'sNameTimeAA %
0.35 ozs32.55Northern Brewer60 mins8.90
0.25 ozs12.93Cascade45 mins5.50

Yeasts
AmountNameLaboratory / ID
1.0 pkgCalifornia Ale VWhite Labs 0051

Additions
(none)

Mash Profile
Medium Body Infusion In60 min @ 152.0°F
Add 5.54 qt ( 1.30 qt/lb ) water @ 168.0°F

Carbonation
(none)

Notes



Converted for 15 gallon batch:



Anchor Porter Clone

Style: Robust Porter
Type: All GrainCalories: 215
Rating: 4.0Boil Size: 16.25 Gal
IBU's: 41.69Batch Size: 15.00 Gal
Color: 45.4 SRM Boil Time: 60 minutes
Preboil OG: 1.062
EstimatedActual
Brew Date:-09/19/2016
OG:1.0651.065
FG:1.0201.020
ABV:5.90 %5.90 %
Efficiency:74 %74 %
Serve Date:10/17/2016/ /

Fermentation Steps
NameDays / TempEstimatedActual
Primary7 days @ 68.0°F09/19/201609/19/2016
Secondary7 days @ 72.0°F09/26/2016-
Bottle Condition14 days @ 74.0°F10/03/2016-

Grains & Adjuncts
AmountPercentageNameTimeGravity
29.90 lbs76.31 %Pale Malt (2 Row) US60 mins1.036
3.45 lbs8.80 %Chocolate Malt60 mins1.028
1.73 lbs4.41 %Caramel/Crystal Malt - 80L60 mins1.034
1.73 lbs4.41 %Caramel/Crystal Malt -120L60 mins1.033
1.15 lbs2.93 %Cara-Pils/Dextrine60 mins1.033
13.80 ozs2.20 %Carafa III60 mins1.032
5.80 ozs0.92 %Roasted Barley60 mins1.025

Hops
AmountIBU'sNameTimeAA %
3.24 ozs29.84Northern Brewer60 mins8.90
2.27 ozs11.85Cascade45 mins5.50

Yeasts
AmountNameLaboratory / ID
3 pkgCalifornia Ale VWhite Labs 0051

Additions
(none)

Mash Profile
Medium Body Infusion In60 min @ 152.0°F
Add 50.94 qt ( 1.30 qt/lb ) water @ 168.0°F

 

[bucketnative]

X = Y * (15/1.63), for Pale Malt, 52*(15/1.63) = 478 oz = 29.9 lb

Looks like you have it correct.

 

[shelbymedic]

Then why would my abv and gravity be different?

 

[Biscuits]

Then why would my abv and gravity be different?

I am going to get a lot of flak for saying this but it is because recipes don't scale linearly, especially when you're converting a 1.63 gallon recipe up to a 15 gallon recipe. Basically, all of the factors that go into calculating volumes and efficiency change and in turn has an effect on them which changes your gravities, srm, etc.

Try something like this:

23 lbs - 76.31 %Pale Malt (2 Row) US60 mins1.036
2 lbs. 10 oz. - 8.80 %Chocolate Malt60 mins1.028
1lbs 5 oz. - 4.41 %Caramel/Crystal Malt - 80L60 mins1.034
1lbs 5 oz. - 4.41 %Caramel/Crystal Malt -120L60 mins1.033
14 oz. - 2.93 %Cara-Pils/Dextrine60 mins1.033
10 oz. - 2.20 %Carafa III60 mins1.032
5.oz - 0.92 %Roasted Barley60 mins1.025


The SRM will be a tad bit off which you can adjust by increasing your darker grains a tad. I.e: instead of using 350L Chocolate malt use 450L and add a few more ounces of your crystal or carafa.