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Maístjarnan

Method: All Grain
Style: Maibock/Helles Bock
Boil Time: 60 min
Batch Size: 47 liters (fermentor volume)
Pre Boil Size: 57.37 liters
Post Boil Size: 52 liters
Pre Boil Gravity: 14.5 °P (recipe based estimate)
Post Boil Gravity: 15.9 °P (recipe based estimate)
Efficiency: 67% (brew house)
Source: Bjórsetur Íslands Brugghús
Calories: 199 calories (Per 330ml)
Carbs: 18.9 g (Per 330ml)

Created: Thursday January 15th 2026

Original Gravity:

15.9 °P

Final Gravity:

3.5 °P

ABV (standard):

6.7%

IBU (rager):

23.8

SRM (daniels):

9.7

Mash pH

5.6

Cost kr

4,690.00

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Brew Log History

Target 15°C
Ambient: {{ stats.ambient | number:0 }} °C

OG: {{ stats.ogPlato | number:2 }}°P
Attenuation: {{ stats.attenuation | number:2 }}%

Calories: {{ stats.calories | number:1 }} / 330ml
Carbs: {{ stats.carbs | number:1 }} g / 330ml

Readings: {{ readingsCount | number }}

Device Filter
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Fermentables

Amount	Fermentable	Cost	PPG	°L	Bill %
10.50 kg	Weyermann - Pilsner10.5 kg Pilsner	kr 230.00 / kg kr 2,415.00	36	1.5	70%
3 kg	Weyermann - Vienna Malt3 kg Vienna Malt	kr 320.00 / kg kr 960.00	37	3.5	20%
1.50 kg	Weyermann - Munich Type I1.5 kg Munich Type I	kr 370.00 / kg kr 555.00	38	6	10%
15 kg / kr 3,930.00

Hops

Amount	Variety	Cost	Type	AA	Use	Time	IBU	Bill %
25 g	Magnum25 g Magnum Hops	kr 10.40 / g kr 260.00	Pellet	12	Boil	60 min	18.84	33.3%
25 g	Perle25 g Perle Hops	kr 10.00 / g kr 250.00	Pellet	5.5	Boil	20 min	2.93	33.3%
25 g	Mt.Hood25 g Mt.Hood Hops	kr 10.00 / g kr 250.00	Pellet	6	Boil	10 min	2.05	33.3%
75 g / kr 760.00

Show Summary View

Amount	Variety	Cost	IBU	Bill %
25 g	Magnum (Pellet) 25 g Magnum (Pellet) Hops	kr 10.40 / g kr 260.00	18.84	33.3%
25 g	Perle (Pellet) 25 g Perle (Pellet) Hops	kr 10.00 / g kr 250.00	2.93	33.3%
25 g	Mt.Hood (Pellet) 25 g Mt.Hood (Pellet) Hops	kr 10.00 / g kr 250.00	2.05	33.3%
75 g / kr 760.00

Mash Guidelines

Amount	Type	Start Temp	Target Temp	Time
40 L	Strike	74 °C	67 °C	60 min
32 L	Sparge	76 °C	76 °C	15 min
Starting Mash Thickness: 2.67 L/kg Starting Grain Temp: 20 °C

Other Ingredients

Amount	Name	Type	Use
6 g	Gypsum	Water Agt	Mash
4 g	Calcium Chloride (dihydrate)	Water Agt	Mash
8 ml	Lactic acid	Water Agt	Mash

Yeast

Mangrove Jack - Bavarian Lager M76

Amount:	2 Each	Cost:
Attenuation (avg):	77.5%	Flocculation:	Medium
Optimum Temp:	7 - 14 °C	Starter:	No
Fermentation Temp:	15 °C	Pitch Rate:	0.35 (M cells / ml / ° P) 261 B cells required

kr 0.00 Yeast Pitch Rate and Starter Calculator

Priming

CO₂ Level: 2.45 Volumes

Target Water Profile

Iceland - avarage

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
50	0	5	65	70	0
Mash Chemistry and Brewing Water Calculator

Last Updated and Sharing

Views

Brews

Public: Yup, Shared
Last Updated: 2026-01-17 20:12 UTC

Recipe costs can be adjusted by changing the batch size. They won't be saved but will give you an idea of costs if your final yield was different.

Cost for

Gallons

Cost by

Final Yield

	Cost kr	Cost %
Fermentables	kr
Steeping Grains (Extract Only)	kr
Hops	kr
Yeast	kr
Other	kr
Cost Per Barrel	kr 0.00
Cost Per Pint	kr 0.00
Total Cost	kr 0.00

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Maístjarnan

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