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BOC Kolsch

155 calories 15.5 g 12 oz
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Beer Stats
Method: All Grain
Style: Kölsch
Boil Time: 60 min
Batch Size: 5.5 gallons (fermentor volume)
Pre Boil Size: 7.5 gallons
Pre Boil Gravity: 1.034 (recipe based estimate)
Post Boil Gravity: 1.047 (recipe based estimate)
Efficiency: 73% (brew house)
Hop Utilization: 96%
Calories: 155 calories (Per 12oz)
Carbs: 15.5 g (Per 12oz)
Created: Tuesday March 10th 2026
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n/a
 
Fermentables
Amount Fermentable Cost PPG °L Bill %
9 lb Weyermann - Floor-Malted Bohemian Pilsner9 lb Floor-Malted Bohemian Pilsner 36.3 1.9 92.3%
0.50 lb Weyermann - Vienna Malt0.5 lb Vienna Malt 37 3.5 5.1%
4 oz Weyermann - Acidulated4 oz Acidulated 27 3.4 2.6%
9.75 lbs / $ 0.00
 
Hops
Amount Variety Cost Type AA Use Time IBU Bill %
1.35 oz Hallertau Mittelfruh1.35 oz Hallertau Mittelfruh Hops Pellet 3.2 Boil 60 min 16.51 51.9%
1.25 oz Hallertau Mittelfruh1.25 oz Hallertau Mittelfruh Hops Pellet 3.2 Boil 10 min 5.54 48.1%
2.60 oz / $ 0.00
 
Other Ingredients
Amount Name Cost Type Use Time
1 tsp Irish Moss Fining Boil 10 min.
1 tsp Wyeast - Beer Nutrient Other Boil 10 min.
5 g Calcium Chloride (dihydrate) Water Agt Mash 1 hr.
2 g Epsom Salt Water Agt Mash 1 hr.
1.50 g Gypsum Water Agt Mash 1 hr.
1 g Salt Water Agt Mash 1 hr.
 
Yeast
Wyeast - Kölsch 2565
Amount:
1 Each
Cost:
Attenuation (avg):
75%
Flocculation:
Low
Optimum Temp:
56 - 70 °F
Starter:
Yes
Fermentation Temp:
60 °F
Pitch Rate:
0.35 (M cells / ml / ° P) 85 B cells required
$ 0.00 Yeast Pitch Rate and Starter Calculator
Priming
CO2 Level: 2.45 Volumes
 
Target Water Profile
Distilled
Ca+2 Mg+2 Na+ Cl- SO4-2 HCO3-
50 6 20 80 40 0
Ended up getting Drinking Water by mistake instead of distilled water.
Mash Chemistry and Brewing Water Calculator
 
Mash Guidelines
Amount Description Type Start Temp Target Temp Time
3.65625 gal Strike 160 °F 149 °F 60 min
5.3125 gal Sparge 168 °F 168 °F 15 min
Starting Mash Thickness: 1.5 qt/lb
Starting Grain Temp: 65 °F
Quick Water Requirements
Water Gallons  Quarts
Strike water volume at mash thickness of 1.5 qt/lb 3.66 14.6  
Mash volume with grains 4.44 17.7  
Grain absorption losses -1.22 -4.9  
Remaining sparge water volume (equipment estimates 4.91 g | 19.6 qt) 5.31 21.3  
Mash Lauter Tun losses -0.25 -1  
Pre boil volume (equipment estimates 7.1 g | 28.4 qt) 7.5 30  
Boil off losses -1.5 -6  
Hops absorption losses (first wort, boil, aroma) -0.1 -0.4  
Post boil Volume 5.5 22  
Going into fermentor 5.5 22  
Total: 8.97 35.9
Equipment Profile Used: System Default
"BOC Kolsch" Kölsch beer recipe by Tadpole2085. All Grain, ABV 4.74%, IBU 22.05, SRM 3.58, Fermentables: (Floor-Malted Bohemian Pilsner, Vienna Malt, Acidulated) Hops: (Hallertau Mittelfruh) Other: (Irish Moss, Beer Nutrient, Calcium Chloride (dihydrate), Epsom Salt, Gypsum, Salt)
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  • Public: Yup, Shared
  • Last Updated: 2026-03-23 20:15 UTC